I've been using Pennzoil in my engines, cars, trucks and boats, for 50 years. I've never had a major failure of a lubricated part. That says it all!

This is the cleanest oil I have ever used and has not let me down over the 6 years I have been using it. Pennzoil PROUD!

[This review was collected as part of a promotion.] Been working flawlessly without failure for years.. Keeps engine clean and smooth.

[This review was collected as part of a promotion.] As a mechanic I have seen a lot of cars with a lot of miles running Pennzoil with great success

[This review was collected as part of a promotion.] great oil u can count on in most conditions i reconmoend it

[This review was collected as part of a promotion.] Have always trusted your products and see no reason to stop now! Simply the best!

[This review was collected as part of a promotion.] I am so glad this is on the market. Definitely worth the money.

Been using for 30 years never had any oil related engine failures or oil consumption even after 300,000 miles.

[This review was collected as part of a promotion.] Always used this for as long as I can remember as did my father and my grandfather

[This review was collected as part of a promotion.] Its all I use, I love. Not one issue for over 100,000 miles!