I am a DIY oil change person and have been using Mobil 1 in all my and siblings vehicles for quite sometime. And Kubota diesel tractor (bought new in 1989). Free shipping from Sams is a bonus.

I thought I’d have to at least add oil after a 1600 mile trip. When I checked the oil it was perfectly clean and barely moved. I highly recommend this oil.

Mobil oil is always what I put in my truck, I have a truck with almost 350,000 miles on it, I've never rebuilt or replaced anything but a waterpump it doesn't smoke and still runs strong I trust Mobil Oil Products.

I started using Mobil 1over 20 years ago. Have sampled other brands of synthetic over time but Mobil 1 is always a constant and the standard to compare to.

I have been using Mobil 1 Synthetic Oil for over 35 years in all of my and my family's cars, motorcycles and lawnmowers. I have always been pleased with the results. My cars show an MPG boost over the factory oil. Great product.

I missed out on the Mobil 1 coffee cup promotion because my designated NAPA store wasn't approved, even though they advertised promotion. I will still use Mobil 1, but will not be going back to NAPA.

I have used Mobil 1 since oil change #1. Now at 170,000 miles the engine still works great. It does not use oil nor has the engine ever required work. Seems like the oil is doing its job.

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!

I've used Mobil 1 since it came out long ago. I do all my own repairs, have never taken a vehicle to a mechanic except for warranty/recalls. My first new car was in 1968.

Have used mobile 1 full synthetic engine oil on my car for many years and been very satisfied. The car now has got over 240k miles and still runs smooth.