[This review was collected as part of a promotion.] This has been used in my Miata and I have over 200,000 miles on it.

[This review was collected as part of a promotion.] I use it every oil change and my car is still running awesome with over 200.000 miles on it

My truck has over 100,000 miles and after I stated using this product it runs better. Does not skip anymore. Life saver!

15 year old chevy truck with over 300,000 on it, this is the product to keep it going for 300,000 more.

I have been using it every since i have been able to buy cars myself and i wouldn't use anything but pennzoil in any vehicle that i own

[This review was collected as part of a promotion.] I have use Pennzoil for year and have great luck with it.

[This review was collected as part of a promotion.] Used it when we did a oil change and it was the best we have ever used!

I use this stuff in my car.it started knocking 6months back.now my car runs great, and i think it will be the only oil I'll use from now on..

I noticed this oil does not break down and gum up engines. It holds its integrity and that was noticeable at both oil changes and engine rebuilds.

[This review was collected as part of a promotion.] I have use this product over 3 years now and works amazing