We took delivery of a 2015 Subaru CrossTrek last year and when it needed its first oil change, I switched from the factory fill oil to a name brand synthetic 0-20. Without discussing anything with my wife (it's her daily driver) she mentioned that the engine seemed "noisier". Hmmmm. I kept that oil in for my usual 3,500 miles and then tried the Mobil 1 - 0W-20. Once again, I didn't mention anything to my wife but she commented that the engine had suddenly gotten quieter... and, oh, by the way, gas mileage went up 2 to 3 MPG (we track mileage VERY carefully). That seems amazing to me - how could a motor oil make such an instant improvement? When I drove her car, the engine seemed to run smoother and it definitely idled quieter. I just bought two more "jugs" at the parts store and won't ever switch.

I have used Mobil 1 ever since it came out and have always been very happy with how clean my engine internals have stayed. On one car I had a head gasket leak at 200,000 miles and the mechanic called me in when he pulled the head off. He said take a look at the internals they look brand new!!! With the valve cover off everything did look brand new, no sludge or coatings of any kind and no discoloration from oil build up or staining either! He asked what oil I have used and I told him Mobil 1 !!

[This review was collected as part of a promotion.] I know absolutely nothing about cars and motor oil. What I do know is this oil is recommend by my mechanic for my car. It keeps my car driving better, smoother and my engine last longer and I need all of this. Mobil Full Synthetic 0W-20 motor oil says it’s better and last 1.5x longer than other synthetic oils and that it exceeds the latest industry requirements for gasoline-vehicles. Plus it’s tested and proven to provide long-lasting protection for longer engine life - I believe this because I have been using mobil oil for years. I had my last car for 10 years.

I never used anything less than Mobil 1 15/50 until I bought my 2010 Royota Tundra. I was very sceptical about using 0/20 Mobil 1. So while I was shopping for oil for my first oil change I called Mobil Oli and explained my difficulty about using a 0/20 motor oil. I bought my Tundra with 9,000 miles on it and it was out of warranty due to over 5 years. So I used the 0/20 Monil 1 and checked the oil level once a week for two months straight. Now that I realize the engine is not using oil, I made a decision to test this motor oil after 10,000 miles. I sent my sample to Blackstone Labortories, the same place I sent my Diesel engine motor oils. When I got my report back I was very happy to read that I could go another 2,000 miles. That tells me the motor oil is doing its job and then some. I use Mobil 1 0/20 Advanced Fuel Economy (the green label) and a good filter. So use the Mobil 1 oils with confidence

Been using Mobile 1 advanced fuel economy in my Honda and Toyotas for several years with zero problems. I receive excellent fuel economy on all my vehicles , well above the EPA estimates. Very happy with this product as well as all other Mobile 1 products I use and previously used in vehicles and equipment.

I have used MOBIL 1 SYNTHETIC in all my Porsches (street and track) since the 80's, but that is another story. This story is about a lawn mower which I bought new and ran "wide open" as a residential "bush hog" for 32 years. I changed the oil every spring with MOBIL 1 SYNTHETIC and noticed each year the oil while dirty (because of the atrocious operating environment) the engine used no oil and performed flawlessly. I became fascinated at about 20 years when I realized this lawnmower was falling apart in every way, wheels, carb, housing sheet metal, studs and bolts backing out of the engine, it was a complete wreck EXCEPT: it burned no oil and suffered no mechanical failures after running for decades and thousands of hours wide open (wished I had a HOBBS). To say the least, I loved this mower, my friends and neighbors howled at my eccentricity, but I paid them no mind, I know and understand true devotion, PLUS I had an ongoing SCIENCE PROJECT which I was going to push (literally and figuratively) to its conclusion. At 30 years the mower deck was "fully ventilated" and was probably dangerous, it needed its third set of wheels and the whole affair was just simply "string and bailing wire". None the less, I was not giving up on "The Red Devil"...I had owned this mower half my life and I was beginning to wonder who was going to be the last one running. I had hoped to open the engine one day and examine the wear index. However, at 32 years my better half insisted that "The Red Devil" had to go. I presented it to a young ARMY vet (who had admired it from afar) with the understanding that he would only use MOBIL-1 SYN and contact me IF the engine ever needed to be taken down as I wished to see the mysteries within. In great solemnity he assured me he would honor the terms and nervously loaded The Red Devil it into his truck. I take great comfort in knowing that if there is a heaven for lawn mower engines, "The red devil" is holding court! I concluded years ago that The Red Devil's longevity was 100% due to MOBIL-1 SYNTHETIC. To this day, I can not hear a mower run without harking back to all the good times with The Red Devil. In spite of all my pleas, my attorneys say I do not have a case against MOBIL and have suggested therapy.

Great price

Great price

High quality oil. I change it every 5,000 miles, because I use it in a congested stop-and-go traffic zone. But, I know it can run for more miles by the way the color of the oil comes out during the oil change.

I just did the oil change and switched it to the 0w20 advanced fuel economy and the difference is noted right away, miles per gallon increased from 29.6 to 30.2