First car I used Mobil 1 in was a new 1978 Oldsmobile Cutlass Supreme. I faithfully changed the oil once a year, every year. When I sold the car 12 years later, the engine ran so smooth you couldn't tell that it was running when at idle. Never burned a drop of oil in 12 years. I have used it in every car/truck I have owned since. Currently using it in a 1999 VW Passat and a 2005 GMC Sierra 1500 - since both were new. If you value your engine, run it on Mobil 1.

I’ve run only Mobil 1 full synthetic for the last 15 years in cars ranging from an 03 Mercury Marauder to the current build on a modified 96 Volvo 850R. I usually run about 5000 miles between changes. The inside of my engines have no sludge build up and the oil looks like clear honey on the way out.

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.

Have been completely satisfied with my jeep's performance using Mobil 1. It's a dependable product that provides the wear protection for my 1997 jeep. I run 33" tires on a 4 banger engine, it's a lot to push that less than perfect aerodynamic vehicle on the highways. But can depend on getting the best performance from this product.

I have a 2001 GMC Yukon XL with 169,000 miles on it. It has been in the family it's entire life and has used only Mobil 1 Full Synthetic. It has never had any engine problems and the engine runs just as good as new. Never will use anything else other than Mobil 1.

I recently changed to Mobil 1 from another synthetic oil in my 1987 Monte Carlo SS. It's got 69,000 original miles, very low for a 29 year old car. What I noticed right away was better oil pressure than I've had before. Not that it was bad, but it is increased. The car means a lot to me, & it's important for me to protect an old engine, even if it has relatively low miles. Seeing increased oil pressure is like a security blanket for me. I will stay with Mobil 1.

[This review was collected as part of a promotion.] I change oil by myself in most of my cars and over the years I've used multiple brands. So far Mobil 1 brand exceeds all of expectations. You can see a big difference in performance when using Mobil 1 motor oil. The engine definately runs smoother. Oil changes are never a problem with this oil. I definitely recommend Mobil 1 oil. It truly stays on top of all the other oils.

I noticed the difference between Mobil1 and other synthetic since the first time i use it on my 2013 Sonic, and now has 56k miles on the clock. The engine turn to be more smooth and quiet. I realize that this is the only oil that i trust. There might be other good full synthetic but i dont want to risk it, for me Mobil1 has proved it all the way.

I keep my 4 Kia Soul on for practically 24 hours! I bought my car with 13,000 miles on it! 15 months later I have 21,000 miles on it. I keep my car idle most of the day and often at night. I drive about 300 miles a day. I drive for Lyft & Uber. Plus I use my air conditioner all day in California and at night. I never treated any car I owned like I treat this one. So far this car has been dependable and reliable. I change the oil every 2-3 months. I don't think any of my former cars could take this kind of abuse! Only my tires do I expect to change in about a year! I been using Mobil 1 when it first came out I think around 1977! ( I could be wrong ).

[This review was collected as part of a promotion.] Well it was that time again to change my oil. So I went and got an oil filter and used the Mobil 1™ 5W-20 I already had. The bottle was easy to open. When I went to pour it it poured out without splashing everywhere. I will definitely use again for my next oil change.