Dropped my engine operating temperature by almost 10 degrees. On a long trip, that's a lot of engine ware. Mfgs would love for you to ware out your engine sooner than later.

How can you beat Mobile One Synthetic Motor Oil? ..... You can't ! It's the best out there!! Even printed on my oil fill cap for my Corvette, it says Mobile One ONLY. Although it is expensive, Sam's had a nice special on Black Friday for Fifteen Dollars off 6 quarts. That was perfect because m Corvette takes 6 quarts and it was due for a California Smog check. I received the 6 quarts shipped from a warehouse from the other side of the country in a timely manner. I changed my oil on the Corvette with this Mobile One 5w-30 and I went to get my car smog checked. The sniffer tube was placed in my exhaust pipe to measure the amount of burned and unburned pollutants my big engine Corvette was putting out. He was AMAZED that it was measurements equated to a brand new car. Certainly I have to give some credit to the type of motor oil that I consistently use. Thanks Sam's Club for the fifteen dollar discount with FREE Shipping right to my door at a time when I really needed this product.

I have had $90.00 plus oil change charges and regularly pay about seventy dollars. By changing my own oil using the oil and buying a quality oil filter I spend about $45.00.

I have used Mobil1 in my 1996 corvette since it was new (also factory fill) i have never had to add oil between oil changes and never had an oil leak. As an ASE Master Technician, I can recommend it over any other oil i have ever used!

the mobile advanced fullsynthetic motor oil is one of the best full synthetic oil out there. I could immediately feel the difference when i added it to my car when i was a little low on oil between oil changes. kept my motor working at peak performance and when the oil was changed about a week later oil tech said oil was practically new. No deep discoloration.

Put in my Chevy 2001 Silverado HD, no issues. Great oil and works out that it's 6 qt box so that's the one exact amount my vehicle takes.

Most folks knows mobile one is the best but hard to find at the price I have purchased it. I am so happy finding this motor oil at that price. This is a good stuff that lasts longer than regular motor oil. I recommend this for anyone uses fully synthetic motor oil.

I’ve been using Mobil 1 synthetic motor oils for approximately 30 years. Extremely satisfied with quality, performance and value. A brand you can trust.

This is very good oil. I use it in all my vehicles (with appropriate weights varying by vehicle requirement)

Oil was delivered with a hole in one quart, oil leaked over the box and the other box that was delivered.