A separate test (Chlorine content,. $24. Motorkote produces unbelievable sludge buildup One of the most popular problems involving Motorkote is that it can cause unbelievable sludge buildup. MotorKote uses engine oil as a carrier host to get to Hyper Lubricant Works in all types of vehicles & places More than an oil treatment MotorKote® Hyper Lubricant® is a synthetic lubricant that molecularly coats all metal surfaces, not just engines to help reduce friction and heat in many different applications. When this happens, you will have a messy engine compartment. 5 gallon (18. 99 $ 59. #22. Reviewed in the United States 🇺🇸 on March 28, 2014. FREE delivery Thu, May 11 . My mix was 3 Qts of Amzoil 10/40 to 12 Oz's of MotorKote. sam_rowlands '17 FXT •. MotorKote Heavy Duty Oil Stabilizer 32-Ounce 100% pure petroleum product increases oils viscosity and is safe in all gasoline and diesel engines while adding lubricity to any type of oil. The introduction ofI've used MotorKote in my last 3 rigs, including the powersteering pumps and trannys, all with great results. Test Results. ago. MotorKote motor oils have the highest quality oils enhanced with anti-wear additives, detergents, dispersants, and are made for multi-grade oils viscosity index improvers. JOIN NOW. 99 Save $1. Bundled pricing discount (s) will be shown when you continue to the checkout page, not on the cart page. FAST FREE SHIPPING 🚚 ON ALL ORDERS $75+ IN THE US 🚨NOW OFFERING WORLDWIDE SHIPPING. 00. Store Locator. 100% pure petroleum product treats both gasoline & diesel engines including 2 & 4 cycle engines, carburetors, fuel injected gasoline engines, automobiles, trucks. Save more with Subscribe & Save. Lucas Oil 11032 Cetane Power Booster. MotorKote will help restore performance and fuel economy. Helps Restore Lost Power & Compression. In fact, removing met. 99 $9. But when moisture is given a chance to sit and mix with the Motorkote is when problems arise. Motor Treatment - Fuel Injector Cleaner and helps reduce sludge in engines with a small dose. Provides a smooth action for reliable performance and improved efficiency, all while cleaning and reducing powder. Simply put, it is meant to do good on the engine. Quantity. Also, curious if anyone had used it,etc. 119. Mar 19, 2015. Tweet. Get Code. 49 Save $4. Apparently Motorkote markets themselves as the leader in the friction modifier market. Snake Oil may really be what it is. I have painted the front sights and muzzle brakes on the carbines with it too. It has over 100 uses. We offer the Axle Fuel Card; an app with exclusive offers for pro drivers and fuel guests; diesel fuel; and Truck Care. Formulated by Prolube, Inc. I originally learned about this stuff through a channel called 'Project. Recomendado para ser utilizado en motores, transmisiones tanto automáticas como manuales. 83 posts · Joined 2012. The Motorkote lubricant is quite effective in reducing friction and heat for better engine performance. eCop Police Supply (1932714) 99% positive feedback. • Safely reaches where others can’MotorKote All Seal Stop Leak 32 oz. While using MotorKote® DEF Reducer™ the combustion fuel catalyst allows the fuel to burn clean and efficiently with minimal soot and contamination. Can be used in crankcases (oil), transmissions, differentials and power steering. TireKote™ not only gives your tires a brilliant deep gloss black shine but conditions and protects the tire to help prevent drying and cracking. MotorKote. MotorKote® TireKote™ is an extreme tire shine and protectant. I was intrigued by the price (originally $15!). MotorKote is the heavy duty solution for Diesel and Gas engines, Fuels and Lubes with the most scientifically backed formulas, chemically engineered to overcome poor quality lubrication, engine heat and wear, DEF reduction, carbon build-up, stiction and gum. Over One Million miles & counting. The difference in price ranges from about $5,000 to $10,000 with the 392 HEMI the more expensive option (as you likely guessed). MetoKote Corporation | 2,004 followers on LinkedIn. Directions: Add 1 ounce per 5 gallon of fuel for up to a 7 point increase. MotorKote is the heavy duty solution for Diesel and Gas engines, Fuels and Lubes with the most scientifically backed formulas, chemically engineered to overcome poor quality lubrication, engine heat and wear, DEF reduction, carbon build-up, stiction and gum. When my '02 PSD went from 17mpg down to 14 mpg almost over night while using Amsoil, I added the recommended amount of Motorkote to the engine and my mileage almost immediately went back up to 17mpg. While using MotorKote® DEF Reducer™ the combustion fuel catalyst allows the fuel to burn clean and efficiently with minimal soot and contamination. It is a CHLORINE based additive that is extremely harmful to an engine. To confirm warranty terms on an item offered for sale by a third party. 4. Location. 0 and 2. BENEFITS: • Often Restores Fouled Injectors • Helps Restore Lost Power & Compression • Fights Deposit Build-up • Helps Reduce Friction Drag & Wear • Helps Prevent Build-up of Harmful Chemical Oxidation. I don't know what Motorkote does to the additves of the oil if anything but I can say that using it kept the viscosity higher. . Lubricate vacuum cleaner wheels. #12. I mistakenly decided to try Motorkote Hyper Lubricant in my engine (5. Jesus Christ died for our sins. I was familiar with Motorkote brand already, was using the HD lubricant (great price on Amazon BTW) and I noticed Motorkote MK-30501-06 Stiction Remover in Amazon suggestions. Cleans injectors to Reduce: Power loss, hesitations, pinging/dieseling, loss of fuel economy. MotorKote now has advanced engine oils for both heavy duty diesel and gasoline vehicles. Not for use with brakes or brake lines. This MotorKote 12 oz. OK, So What Can Motorkote Do for My Car (and My Wallet)? Well, according to the data I collected, it can improve your gas mileage by about 9%, possibly add 4% torque at the wheels, and save. Into Great Brands, Inc. Mrs. Find a store. They tout that the fluid contains a [long molecule that bonds to metal]. 7. MOTORKOTE Hyper Lubricant has NO long or short term corrosive effect on metal. 99 $3. My motorcycle has a problem with harsh gear changes and I decided to give it a shot after hearing good things about it from various sources. On April 21, 2011 she married Rusty Davis; he survives along with 2 siblings, Judith (Alan) Williams, Carol (Terry) DeSchepper, and. MotorKote Heavy Duty Motor Treatment is to be used in all gas, diesel, ethanol fuels, and in engine oil crankcases. . MotorKote® is proudly made in the USA and originally launched in 1992 and instantly adopted by the Long Haul Trucking community because of the unique ability of the products to reduce heat and friction in multiple applications including engines, transmissions, power steering and differentials. #3. If you enjoy this video please consider subscribing: Even more gains on the Grand Prix in part 2:is different because it uses that base fluid as a host or carrier to get to the metal. MotorKote Ultimate 40/60 Synthetic Hyper Mix 5W-30 MotorKote® Ultimate™ is designed for constant MotorKote® protection. 50 Inches. Our oil treatments are compatible with all leading oil brands, both mineral and synthetic, and our fuel treatments are compatible with all diesel and petrol fue ls. Add to cart. As its been posted before, synthetic is the way. 00. I painted them last night and they were dry to the. Price $0. Then again, I filled up at a different Marathon station than usual (same gas, you would think). Outdoor use recommended. MotorKote® originally launched in 1992 and instantly adopted by the Long Haul Trucking community because of the unique ability of the products to reduce heat and friction in multiple applications. 00. Items Available: All Products - Engine Treatments, Fuel System, Aerosol, Etc. MONOKOTE® MK-10/HB Extended Set Safety Data Sheet. 0's run for multiple hundred of thousands of miles on plain old dinosaur derived oil, what measurable benefit does this product add to oil ? My 1999 is approaching 300,000 miles. Motorkote is great! Lucas doesn’t hold a candle to it. 00. It's engine cancer in a bottle with a massive profit margin. MotorKote offers a range of products to improve the performance, fuel economy and lowers maintenance costs of your engine, such as diesel oil, fuel treatment, lubricant, spray and funnel. Afterwards I used a Q-tip to apply the Motorkote to all the places that metal moves in contact with metal. Save more. Conozca más de. Share Tweet. compounds considered in this project are made of boron, oxygen, nitrogen, and hydrogen, which are more environmentally benign. REV X® Max Power 4-Stroke Engine Treatment is the ultimate product to bulletproof your engine to avoid catastrophic engine failure. Tem dúvidas sobre como aplicar Motorkote 100 no seu carro? Confere no vídeo como é fácil de proteger o motor do seu carro usando nosso Motorkote 100! --Fale. MotorKote Heavy Duty Motor Treatment is to be used in all gas, diesel, ethanol fuels, and in engine oil crankcases. 100% Guaranteed to Remove Stiction. SAFE & EFFECTIVE FOR USE IN ALL DIESEL FUELS While using MotorKote® DEF Reducer™ the combustion fuel catalyst allows the fuel to burn clean and efficiently with minimal soot and contamination. These are what give additives a bad. Opti-Lube Boost! Maximum Cetane Formula. Add to cart. 00. AMERICA'S #1 FRICTION FIGHTER™ MotorKote® Hyper Lubricant® is a synthetic lubricant that molecularly coats all metal surfaces, not just engines to help reduce friction and heat in many different applications. Last year I bought a small jug of Motorkote after hearing of it and reading up on it. This is related to newer injection technology that runs hotter & causes the oil side of the injector to stick or foul. #5. 99 Save $3. These additives have a LOT of detergents in them and are very aggressive. 4L engine introductions. He basically stole the product from a company called SFR and stole their proprietary information and marketed it. MotorKote says it is a Friction Reducer, not an additive, 3x stronger and lasts 4x longer than other brands, and what also got my attention, 'Helps protect from oil starvation at start up' - oh, yeah, I've got personal experience with that! Changed the oil at 40k miles, added Hotshots Secret FR3. MotorKote® All Purpose Spray Lubricant with MotorKote® Hyper Lubricant added is a superior solution to help prevent friction, wear, noise, rust & corrosion on metal parts. #66. MotorKote is the heavy duty solution for Diesel and Gas engines, Fuels and Lubes with the most scientifically backed formulas, chemically engineered to overcome poor quality lubrication, engine heat and wear, DEF reduction, carbon build-up, stiction and gum. there was a lawsuit awarding sfr that Motorkote did in fact use unlawfully sfr's information. $29. Angrywarvet. Add to cart. Power Service Cetane Boost – The Best Diesel Fuel Additive. Try to remember to add the anti-gel. $13. 7 HEMI vs the 6. • Cleans dirty injectors. All Purpose Lubricant Spray is Rust & Corrosion Resistant. MotorKote® Sticky Red Grease™ is a premium NLGI #2, heavy-duty, EP multi-purpose lithium grease fortified with polymers, antiwear agents, tackiness additives, high viscosity base oils plus rust and oxidation inhibitors. #5 · Mar 3, 2010. Motorkote Hyper Lubricant is a synthetic lubricant that molecularly coats all metal surfaces, not just engines to help reduce friction and heat in many different applications. 68" Color: white Vinyl Transfer Decals make it easy to apply, our transfer stickers are durable & ideal for indoor or outdoor use. FREE delivery Wed, Nov 8 . so far my (whine) has been cut in half. Originally to save drivers fuel costs and net them $100 in their pocket after one application per 3-4 oil changes. Only 10 left in stock - order soon. Wipe down all the metal parts with MotorKote Hyper Lubricant lightly and let soak in overnight: Your mower will repel moisture and. The lawnmower test does support the manufacturer's claim that water doesn't wash it away. 75 x 3. Our Heavy Duty Guarantee is the best in the industry. End of story. It's not. OVERSTOCK SALE; SAFETY PRODUCTS; Automotive Entry Tools. The product works by softening and expanding rubber seals within these systems, stopping minor leaks. #1 · Oct 16, 2010. MotorKote will help restore performance and fuel economy. 66. • Cleans & removes harmful carbon deposits, gums, & varnishes. I use Motorkote,and have been for the past 3 oil changes. Motorkote, Slick 50, Lucas Oil Stabilizer, and similar contain no useful additives or base oils at all and thus are snake oil and potentially harmful. Oct 22, 2023. Formulated to protect and treat the Catalytic Converter & Exhaust System from oil poisons. Share Tweet. Be sure to use a proper amount of biocide. O'Reilly Auto Parts carries MotorKote products. It feels soft and lightweight, with the right amount of stretch. Formulated to address the Ultra Low Sulfur Diesel Fuel (ULSD) Issues of. Motorkote is a popular oil additive brand that prevents corrosion, reduces foaming and friction, and modifies viscosity. That is de facto , psudoscientific even placebo type logic, people. Location. , (IGB) the parent company of Dura Lube and MotorKote performance chemical products was formed in 2005 as a consumer. $12. After reading a little bit online I learned that Motorkote contains Chlorinated Parrafins which eventually can corrode and subsequently damage internal parts of the engine whenever. I did the mileage test from step 1 again. Unico con el 100% del ingrediente activo, lo que lo hace compatible con cualquier lubricante de la clasificación API (Prueba de laboratorio secuencia IIIF). 99 Save $2. 87/Fl Oz) List: $32. Αγόρασε εύκολα μέσω Skroutz!MotorKote is the heavy duty solution for Diesel and Gas engines, Fuels and Lubes with the most scientifically backed formulas, chemically engineered to overcome poor quality lubrication, engine heat and wear, DEF reduction,. 14 oz. Incredibly, some of today’s aftermarket engine oil treatments still have a significant chlorinated paraffin content. 5 Qts of oil would be 160oz. Our Heavy Duty Guarantee is the best in the industry. Truckers love Motorkote. MotorKote uses engine oil as a carrier host to get to metal parts and bond to metal. 87. Σε κάθε περίπτωση το Motorkote έχει βελτιώσει. 5/29- 9/25- 4/3 - 8/20 ALum. I think it is genrally meant as a fuel additive, which is what i have mainly used it for in the past. DR1. but this video definitely got me believing MotorKote could actually work. 4L V8 is our pick. com. SAFE & EFFECTIVE FOR USE IN ALL DIESEL FUELS. $30 off discount - 18,000 MotorKote Miles. Helps your fuel burn CLEANER AND HOTTER for better fuel economy and. CAUTION: Wear all safety equipment recommended on the SDS sheet. Once all the water has been removed from the tank, add a biocide to the fuel. Lawnmowers Add 2 ounces per quart of MotorKote Hyper Lubricant to the Oil: It will start easier, run cooler, reduce fuel consumption, reduce wear. NOTE - This product is made by a 3rd party supplier and will ship separately. Lasts through 4 oil changes. 99 Save $5. 00. Today MotorKote® products are being used not only in the Trucking Industry, but in all types of engines throughout the world. $11. Prueba Falex Standard ASTM (Asociación Americana de Métodos de Prueba) donde se visualiza que MOTORKOTE 100 reduce la fricción en más del 60%. While using MotorKote® DEF Reducer™ the combustion fuel catalyst allows the fuel to burn clean and efficiently with minimal soot and contamination. But when moisture is given a chance to sit and mix with the Motorkote is when problems arise. 99 Save $3. Davis, 68, passed away October 30, 2023, at the Center for Hospice Care the Esther House. burn cycles and extend Diesel Particulate Filter (DPF) life. After reading a little bit online I learned that Motorkote contains Chlorinated Parrafins which eventually can corrode and subsequently damage internal parts of the engine whenever. 50. 10 used. Can be added to transmissions, power steering pumps and bunch of other stuff. Quantity. Sale. . Motorkote products are made from premium ingredients and are super concetrated which means you use less. Shoppers saved an average of $14. If you follow motorkote reccomendations at 2oz per Qt that would be 10oz for 5 qts lets say. In depth tests confirmed an additive, Motorkote. Feb 24, 2011. 99. Pour in Oil / Crankcase. 100% pure petroleum product treats both gasoline & diesel engines including 2 & 4 cycle engines, carburetors, fuel injected gasoline engines, automobiles, trucks. Wipe down all the metal parts with MotorKote Hyper Lubricant lightly and let. Pro Taper 520 MX Chain (120 Links) (Gold) Making it into our list of best motorcycle chains is the Pro Taper 520 MX chain, which is famous for its strength and performance. CK20. Similarly, here is a good article, also by amsoil, on why the timken machine motorkote uses is not a. Keeps ax blades sharp and rust free. Uses: All Wheels and Tires including: Semi Truck, Tractor, Work Trucks and Vans, RVs and all automobiles. FAST FREE SHIPPING 🚚 ON ALL ORDERS. Hyper Lubricant® uses engine oil as a carrier host to get to metal parts and bond to metal. MotorKote will help restore performance and fuel economy. You name it, MotorKote has it. Due to the corrosive nature of chlorinated paraffin byproducts they serve absolutely no purpose in any motor oil. I know, I am a commercial trucker and see it every day. MotorKote products have been designed and tested to their limits so you can go beyond yours. Prueba Falex Standard ASTM (Asociación Americana de Métodos de Prueba) donde se visualiza que MOTORKOTE 100 reduce la fricción en más del 60%. MotorKote Gun Oil is infused with MotorKote Technology which provides the best wear reduction that protects under the harshest weather and firing conditions. Into Great Brands, Inc. Does not alter SAE ratings or void warranties. 95 for a 32 oz bottle. Motorkote is an engine lube. Motorkote is ran by a man named David Persall that knows nothing other than marketing infact he has a mba in you guessed it marketing. MotorKote will help restore performance and fuel economy. burn cycles and extend Diesel Particulate Filter (DPF) life. . Catalytic & Exhaust Treatment - Specifically for that OBD code P0420 while keeping the Catalytic Converter & Exhaust System clean from oil poisons. This heavy duty formulation is proven to treat metal on metal wear in any mechanical part. Made in the USA motor oil, engine treatments, diesel fuel treatments, gasoline treatments, heavy-duty treatments, leak stops, grease, cleaners, and more. akkshole said: I've started to get a ticking sound out of the engine the last few weeks. MotorKote® uses engine oil as. The Cummins was saved from high heat from thin engine oil, and gained 5% getting it just shy of 7mpg. Mar 19, 2015. Motorkote MK-HL32-06 Heavy Duty Hyper Lubricant Engine Treatment, 32-Ounce, Single, Black. Motorkote Catalytic And Exhaust Cleaner Treatment Fuel Additive, 16 Fl. It works with polymer adherent compounds and bonds to all moving parts and lasts up to 50,000 miles. If power and performance are the end goal the Dodge 6. 5 oz. by Campfamily. If our products do not work as promised, then we will give your money back. Yes, I tested it in my 2011 Fusion somewhere back in the 40k range. As a matter of fact, some users think of it as life insurance for their engine as it serves as a protector that can make their engine run smoother again. Warrantee relief was denied by Cummins and Amsoil. Has anyone special ordered the the package and not get the receiver and harness apon delivery. DEEP GLOSS BLACK SHINE: Delivers super-glossy protective coating for a deep, dark, insanely wet look Messages. Choose an item or category to find the specific. • It does not require heat to become active, others do, which does not protect against cold starts as MotorKote does. Shop by Treatment Diesel PoweredI purchased this Motorkote - Heavy Duty Hyper Lubricant for my Hisun - 99cc 3HP OHV Engine that comes in a Coleman Powersports - CT100U Mini Bike. So there is a specific set of circumstances that allow for long term use to potentially cause damage over time. MotorKote® All Purpose Spray Lubricant with MotorKote® Hyper Lubricant added is a superior solution to help prevent friction, wear, noise, rust & corrosion on metal parts. 1 ounce treats 1. MotorKote Hyper Lubricant is a premium heavy-duty friction fighter formulation that bonds to metal surfaces on contact to reduce. Motorkote is different because it uses that base fluid as a host or carrier to get to the metal. MotorKote Universal Power Steering Treatment is a full synthetic specially formulated fluid to eliminate any worry about compatibility issues of your existing power steering fluid. Actually seems like it could be a legit product. The product also claims that even water won't wash it away. (Not straight Chlorine) You can educate us all by sending a virgin sample to Blackstone Labs. MONOKOTE® MK-1000/HB Safety Data Sheet. Motor Kote military & senior. Está integrado por. Amsoil found the additives contained high amounts of chlorine that combined with hyrdrogen and formed hydrochloric acid, which led to the engine's destruction. 99 $22. It is a CHLORINE based additive that is extremely harmful to an engine. 00. Motorkote hyper lubricant can be added to the oil of any engine. 8oz divided by 160oz of oil would be . Specials are a limited time offer. A separate test (Chlorine content, bomb method, ASTM. 87/Fl Oz) List: $32. Price $0. AtomOil Oil Additive for Car Engine and Protection | Nano Technology Motor High Mileage Treatment | Atomic Scale Protective Oil Treatment, 16 Oz. 41. Quantity. I have used MotorKote to soak into my G4 Gl**ks to prevent scratching. MONOKOTE®. Motorkote treats the engine via oil. We have added synthetic polymers and antiozonants to prevent browning and premature aging. WL 2023 Grand Cherokee Trailer Prep Package. Hunting. If Motorkote does work, it seems that it might be better suited for transmissions or maybe industrial applications. It's comfortable and flattering for both men and women. 9L) AMERICA'S #1 FRICTION FIGHTER™ MotorKote® Hyper Lubricant® is a synthetic lubricant that molecularly coats all metal surfaces, not just engines to help reduce friction and heat in many different applications. I added motorkoat to my transmission and I got some surprising results! The video speaks for itself but if you want to purchase some motorkoat I have an affi. Virgin oil analysis, as shown on bob is the oil guy forums, have shown levels of up to 28% chlorine in motorkote. Save up to 10% OFF with these current motor kote coupon code, free motorkote. Yes put that motorkote in your car you only need 10 ounces in your average car I have run this stuff in my Peterbilt and personal vehicles for years and years, it's fantastic stuff! My truck now has 2,250,000 miles on it with only two overhauls in twenty-three years. In depth tests confirmed an additive, Motorkote. Tweet. Motorkote Hyper Lubricant/Engine Treatment. All oil tests on the engine are right at 20000 miles more or less between changes. It is specially designed for modern four-stroke bikes. We always let this truck in storage in the winter. Once it gets to the metal it chemically bonds to the metal drastically reducing friction. MotorKote All Seal and Fuel Optimizer Combo (2. MotorKote will help restore performance and fuel economy. lab said "dump your oil and dont ever use it again" I added Motorkote to the engine oil, transmission, power steering, and a few pulleys on the accessory drive. MotorKote is the heavy duty solution for Diesel and Gas engines, Fuels and Lubes with the most scientifically backed formulas, chemically engineered to overcome poor quality lubrication, engine heat and wear, DEF reduction, carbon build-up, stiction and gum. MotorKote WipeOff is an Industrial and Commercial waterless wheel and tire cleaner that penetrates and dissolves grit, grime, brake dust, grease and salt. Motorkote does not blend with the base fluid oil. MotorKote® Hyper Octane Boost™ in every tank of fuel can help: increase octane, combustion, improve overall performance, remove engine knock, improve fuel economy, restore lost power, and improve acceleration. I had a massive Cummins engine failure due to Motorkote oil additive. Many times in these older gas and diesel motors I have experienced the engine running hot when pulled hard, and that they are hard to start due to the friction between the aging parts. 9 in 20k. Originally Posted By: Turtle268. Here at USA TODAY Coupons, we spend hours searching the internet for all the latest money-saving discounts, promos, coupons and offers to help you save. Aug 18, 2012. It puts a nice luster on the finish. 99 $28. 49 Save $9. 0 out of 5 stars. This reduction in friction saves you money. 28% of 10oz would be 2. Sold Out. I have to say, I'm pretty skeptical about just about all of the over-the-counter oil additives that claim lower friction, stick to metal, etc. Shelves at truck stops loaded with all kinds of additive stuff that makes bold claims. I SEEMED TO GET BETTER MILEAGE ON TRIPS, BUT THE. That's all. 304,000 (30. Technical Details. 64 auto car semi, 36 model B allis-Chalmers, 56 JD model 60. put it in all my vehicles and tractors -mower's and anything else that i think it will work for. burn cycles and extend the Diesel Particulate Filter (DPF) life. MotorKote is the heavy duty solution for Diesel and Gas engines, Fuels and Lubes with the most scientifically backed formulas, chemically engineered to overcome poor quality lubrication, engine heat and wear, DEF reduction, carbon build-up, stiction and gum. This will be your favorite shirt. MotorKote claims that it's not an additive, but rather a friction reducer. Winter Park (1) Yulee (1) Zephyrhills (1) O'Reilly Auto Parts stores in Florida carry all the parts, tools and accessories you need, as well as offering free Store Services like battery testing, wiper blade & bulb installation, check engine light testing and more. MotorKote® Hyper Lubricant® is different than traditional additives such as Lucas. Cleans and increases performance. . Save BIG w/ (24) Motor Kote verified coupon codes & storewide coupon codes. 2) Motorkote MK Million Mile Formula. MOTORKOTE Hyper Lubricant additive is a premium synthetic heavy-duty formulation that bonds to metal surfaces on contact.