I have run this stuff for years. I've never had an engine problem. Run it in all my family vehicles.

[This review was collected as part of a promotion.] Wouldn't trust any other product for my truck! Penzoil is the best.

[This review was collected as part of a promotion.] Have used Pennzoil in all of my vehicles and never had engine troubles even after 200k.

[This review was collected as part of a promotion.] I use this with every oil change it does my car good!

I have been putting pennzoil in my cars for the last 10 years best thing I ever did still runs like a new one

[This review was collected as part of a promotion.] I've been using this for years and never had a problem.

[This review was collected as part of a promotion.] Available everywere i go.. Affordable ... Holds up to the test

[This review was collected as part of a promotion.] I have used Pennzoil in my vehicles for over 25 years and will continue for many years to come

Been Using Pennzoil for a while. I switch from 5w20 to 10w30 once our Hondas reach 100k. Thanks for everything Pennzoil :) You Guys Rock :)

[This review was collected as part of a promotion.] I have been using it for 40 years and can't be any happier with the profomance