I have 2 Subaru 2009 Foresters that I bought new. Changed both of them over at 10,000 miles to Mobil 1 synthetic oil and Mobil 1 filters. From then I changed oil and filters at 10,000 mile intervals. Now both are at about 200,000 miles each and running strong. No smoke or engine problems.

I'm from the old school and have changed my own oil for the last 42 plus years. About 7 years ago I switched to Mobil1 to give it a try since my daily drive to work adds 95 miles a day. Best choice I could have made, Excellent product with proven results and a very satisfied customer.

[This review was collected as part of a promotion.] The Mobil 1 Advanced Fuel Economy is the quality oil you would expect from Mobil. The oil has provide advanced engine protection and I have noticed better fuel economy. My car is running noticeable smoother. Highly recommend!

[This review was collected as part of a promotion.] Once your engine feels full synthetic oil, you won’t want to go back. Mobile 1 synthetic oil is the best thing you can feed your cars engine. No argument it is more expensive but your next oil change is also 2-3 apart, so you might actually save money by using Mobil 1. Plus, you extend the life of your car. I used Mobile 1 on my truck since I purchased it in 2004. In 2019 I retired it with 450k miles. My new truck is only getting Mobil 1 synthetic oil.

Fairly concise and to the point.....My 2003 MDX has 403,000 miles, is still getting very close to rated hwy and city gas mileage of 23/17, and is burning very little oil while power is also similar to new. All oil changes using Mobil 1 conventional, then blend, then full synthetic @ 5K intervals. The Honda J35A6 engine that powers the MDX still has many miles to go. Thanks Mobil 1.

[This review was collected as part of a promotion.] I have purchased Mobil synthetic motor oil for my vehicles for years now, because it is rated to be better than conventional motor oil. It is formulated with additives that enhance the oil's performance. I have had zero problems with my engines.

I first began using Mobil One synthetic motor oil for my 1994 Honda Civic, which I purchased new in 1993. At 150,000 miles I decided to check my valve lash adjustment. I took off the valve cover and inside everything looked like new. I couldn't believe it. I changed the oil and filter every 7,500 miles, and the valves were still within specs as well. Today I use it in both of our cars, our 2016 Volt, and 2010 Prius, in 0w20 weight now. I will never use any other motor oil then Mobil Synthetic motor oil.

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.

[This review was collected as part of a promotion.] Perfect for my 2007 BMW 330i. No valve noise after i start the cold engine. In hot run perfect and have too much power for twin turbo. I recomended this 0w-40 mobil 1 full syntetic motor oil. it's the only oil i use.

Been using this and other Mobil 1 oils since 1983. Never had an engine problem. I have two Toyotas with over 300,000 miles and use less than a quart of oil between 5000 mile oil changes. Sold a Ford van to someone with 250,000 miles, saw him a couple years later, he had damaged the body, but told me that truck is the best truck he ever owned and was still using Mobil one as I suggested when I sold it to him.