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 started using Mobil1 in 1989. Back then I was still working and received free in house oil analysis at no cost as an employee perk. The results were obvious. I now use Mobil 1 in all my vehicles, six now which includes 2 Corvettes.

Been using Mobil 1 full synthetic oil for years in all three of my cars. I have full confidence in the product consistency and quality. Now converting my son to do the same with his cars.

I only use Mobil. If you don’t wanna use oem the feel assured Mobil 1 at bare minimum meet the same quality and in most cases exceed it. Make Mobil 1 your first choice if it’s not your only choice.

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 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’ve been using Mobil 1 for quite a while and i feel like it’s keeps my engine protected. I know the corvette racing team uses it and with the stress those engines go thru I think it will be perfect for my cars and trucks.

I consider Mobil 1 to be the best oil for my vehicles. It is a quality product with the best technology developed over the years and ensures a good running motor for the life of the vehicle. It has always performed great in all my vehicles.

I bought this a few months ago and have no idea if this oil is better than any other oil however I keep using it since it is what the user manual recommends.

Use it in all three of my vehicles, 98 F150, 98 Lincoln Mk VIII, 2005 Explorer. Definitely helps keep engine internals clean. Been using this for over 10 years, no complaints