Mobil1 5W-30 full synthetic with Dexos SN Plus is really an amazing motor oil. I tried it in both my Mercedes sedan and wife's GLE. It works much better than whatever 5W-40 the dealership had been putting in before. I noticed my engine heat gauge runs 1 tick mark lower that where it usually is and gets slightly better fuel economy.

[This review was collected as part of a promotion.] My uncle taught me at a young age that if u put Mobil synthetic in ur vehicle and it will last forever!!!! And welll I’ve been taking his advice for over 30 years and I have yet to see a motor go that wasn’t already using Mobil synthetic!!!!

I can't say enough good about the Mobile One synthetic oil. I started using it in my wife's 1990 Astro van and we drove it more than 250,000 miles on the original motor with no major repairs. Also, I bought a 1989 Astro van used with 89,000 miles on it and change it to Mobil one oil and drove the original motor over 365,000 miles. Presently drive a 2001 Astro van with over 400,000 mile, but its on its second engine, with 225,000 on the first engine, second engine with over 175,00 miles. I started using Mobil One because I drove over 3,000 miles a month and it was cost effective to use Mobile One and change the oil every 5,000 - 6,000 miles. I now use the extended oil and drive 15,000 miles to a oil change. I now have my whole family using Mobile One oil.

When I was much younger and running hot rods ('66 GTO and a '68 Mustang fastback Bullitt clone) I used GTX 20-50 and it worked ok in those cars at that time. As I have gotten older and, while my taste for fast cars hasn't changed, I now drive something a bit more refined, a V-12 Mercedes SL600 and a smaller V-6 Mercedes SLK320 Sport and I use strictly Mobil 1 5W-30 in both. Both cars run so smooth that at idle , and aside from the blurble of the exhaust system, you cannot tell they are even running. Mobil 1 5W-30 is the factory recommended oil for the SKL320 according to the sticker under the hood. The SL600 didn't have a recommended oil but I use the same 5W-30 in it as well. We also have a Ford Expedition with a 5.4 liter Triton V-8 and I figured that if Mobil 1 is recommended for a Mercedes, it's more than good enough for the Ford, too. I do all the maintenance on all our vehicles, except for any major repairs, and I change the oil and filter every 3,000 miles even though Mercedes recommends oil and filter changes every 10,000 miles. If you have ever owned a Mercedes and had to have major repairs performed at the dealership you know it can b e a rather spendy experience, so I would rather spend a little extra money on oil changes now than on major engine repairs in the future. Mobil, I absolutely love your product!

Been using Mobil 1 for decades. Almost considered switching when Mobil 1 was changed from what a consumer thinks when he reads " true synthetic".....to what the government allows to be called a true synthetic. Have two Jeeps with checkered history's in regard to their engines....an '02 3.7 and an original 2012 Pentastar V6 engine ( before the head mods of newer Pentastars). The '02 3.7 supposedly has an unexceptably high rate of catastrophic engine failure because of too small oil channels...that when slightly gunked up...allows too little oil flow and the early Pentastar engines... which before valve guide hardening in newer versions... suffered from premature valve guide wear and failure as a result of heat and substandard lubrication. Hoping that the high detergent content and above average wear protection and reduction of oil breakdown...to make the difference. These engines will put Mobil 1 to the test

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.

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.

My wife and I just purchased our own house. So with home ownership we have been thinking about how we can save money one of the ways is to start doing our own oil changes. But after going over the mileage and needing a oil change we stopped in at our local Mobil 1 and was greeted by the manager John who not only had his team give us a much needed change but did it with a level of customer service we thought didn't exist anymore . I am more than capable of doing my own oil change now that I have the space but after going to this clean well maintained well managed location I will defiantly be doing my oil changes there. customer service goes a long way in my book. thank you John and your team.

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 a 1999 Pontiac Trans Am WS6 with 114k miles. I just pulled the motor for some upgrades and I couldn't believe how clean the internals were. This is the first time this motor has been opened up. It's never been cleaned, flushed, etc. It has, however, never had anything but Mobil 1 Synthetic in it. After my experience so far, it'll never have anything else in it either.