I've had my 1998 Ford F150 with a 4.6L SOHC V-8 since new. I run only Mobil 1 5w30. Drove it 266,000 miles until it blew a head gasket. Where we tore it apart - absolutely NO WEAR - ZERO. Clean inside and no wear. Cylinder walls still had a crosshatch pattern. Crank and cam journals were void of wear and we went back with standard sized bearings. I can provide images of this engine when it was torn down. Mobil 1 for life.....FOR LIFE. Engine is now rebuilt and ready to go back in my truck. Had I taken better care of my cooling system it would never have blown the head gasket. It would have gone way beyond 300,000 miles WITHOUT A REBUILD on Mobil 1.

I have been using Mobil 1 synthetic motor oil in all of my many autos, starting with their first oil change. I also use the proper Mobil 1 oil filter. My current auto, as of August 2015, is a 2007 Ford Escort Wagon, with the 2.0 Liter engine. For the last 4 years, I have been driving 30 miles, one way to work 5 days a week, mostly freeways. Through the hot summers and cold winters of Northern Ohio, I have had no engine problems. I have driven this wagon, on vacations that average 1,000 miles or more with no problems. My wagon sits outside in the, some times sub-zero cold and wind all day. When I start it up, it starts as if it was a warm summer day! My 2.0 liter engine does not burn any oil and it still runs fast and strong after all these miles. The only reason I replace my autos is due to living in the 'Rust Belt' where salt is used on the roads, which destroy the bodies with rust. WARNING! I do not recommend the following; I change my Mobil 1 M1-102 filter every year or two and I usually change the Mobil 1 5w-20 motor oil every 2-3 years. I'm 'Old School', Born in the early 1950's. We tested the oil by taking a drop from the oil dip stick and squeezing and rubbing it between the index finger and the thumb. My 'Old' oil still has the viscosity (slipperiness) of new oil and there are no bits, pieces or particles of anything in it. Thank you Mobil 1 for a terrific product!!

I came from a large surface coal mining company and we were owned by a major oil company. We were bound to use their motor oils in our equipment. In thirty years of managing the maintenance department and overhauling and repairing all types of engines I can say that while the major oil companies oils were fine, but there is no comparison in the appearance of the inside of the engines with one that has ran Mobile 1. I recently rebuilt the engine in one of my Corvettes that had 150,000 miles on it. The motor had not failed and was torn down to repair oil leaking from both rear corners of the oil pan. The oil pan itself was at fault and no seal had failed. The engine was clean inside and all bearings looked as good as new. It was in remarkable shape and had used Mobile 1 from the factory till its repair. I would never consider any other motor oil in my Corvettes as long as Mobile 1 is available.

I use Mobil1 5w30 in each of my three cars, an 07 Chevy truck, 01 Corvette track car and an 88 Corvette. I had the track car out this past weekend filled with Mobil1 and it ran smooth and cool all weekend. In fact I’ve never had an oil related issue with any of my cars. And I’ve used Mobil1 exclusively for approximately 10 years. The 88 Corvette was switched to Mobil1 about twenty two years ago and run like a top every time I drive it, which isn’t often anymore. So that car sits around a lot. Great product!

I was a firm believer in this oil and was very proud to tell people I was a user of Mobil 1 full synthetic! That is until I recently got a bad lifter tick and pulled the valley and valve covers off of my 2003 5.3 liter Silverado and seen the god awful gunk build up! It was unreal! Definitely not what I was expecting after spending good money on what I thought was great oil. I would not go over 6,000 miles between oil changes. I have built a fresh 5.3 and I will be using AMSOIL!!!!!

This week we had to take the valve covers off my 2002 Jeep Grand Cherokee Limited. Finally had a valve stick & kick off a rocker arm after 250,000 miles. I bought this Jeep in 2007 with about 50,000 miles on it, & since then it has had nothing in it but Mobile 1. When we took off that valve cover, the cams & all still look new! No gunk anywhere, just clean oil soaking everything. Thank you Mobile 1 for keeping my Jeepy running to a quarter million miles, & longer after we fix the current issues ;)

I bought this oil to replace old oil in my daughter's 2009 Chevrolet Suburban, 3 days later( approximately 75 miles ). She called me to come help her because she was broke down at the end of the road I live on. I soon discovered the piston sticking out the engine block. Engine oil life is still at 100%. Very DISSATISFIED

I started using Mobil 1 back in 96 when I bought my 1996 Chevy C1500 pickup. right away, after the engine was broke in and had some mileage on it, I changed it to Mobil 1 Synthetic and no issues. After I sold the truck and brought a new 2002 Chevy Silverado with a 5.3Liter, I did the same thing. immediately switched over to Mobil 1 and I still have the truck and it has 135,000 miles on it and runs great, smooth idle and no leaks!! I have added two other cars to use Mobil 1 oil and I have a 09 Impala SS with a 5.3Liter and just bought a 2015 Fusion Titanium 2.0l turbo that are using Mobil 1 and the Mobile 1 oil filters. I go between 5000 to 6000 miles for the oils changes and to know I'm using this oil, I feel my engine is protected and gets through cold winters and hot/humid temps in the summers. I'll never use anything else, but Mobil 1 synthetic!!

I've been using Mobil 1 for well over 15 years in my vehicles. I like knowing that my engines have very good oil in them keeping them running at their best. This is a simple thing you can do for your car/truck. Conventional oil is out dated now and I don't want to worry about engine sludge or oil break down. Engines run hotter today and with Mobil 1, I don't worry about the oil. It kept my 1998 Dodge Ram running good and I used Mobil 1 in my 05 Magnum R/T with the Hemi motor. The Hemi has some design flaws ,especially the early generation iii's with small oil return and prone to clog with sludge and oil when it breaks down. I don't give that at thought with Mobile 1. I bought the car with 11k on it and immediately put in Mobil 1 and have been using that ever since. Along with the premium gas I run in the car it's a cheap way to keep the engine running longer and better not worrying about pre ignition happening. My engine runs like it was just made.

I purchased a 2000 grand marquis in 2001 with 22,000 miles on it, changed the oil to Mobil 1 5W-30 fully synthetic oil and set it up on routine changes every 7500 miles. Today August 2019 I have 584,632 miles on it and its still running strong, with no major repairs to the engine. Oh yes, I went through many spark plugs, coils, belts, hoses and lots of tires but no repairs to the motor. I give this credit to Mobil 1 oil.