My dad had bought a 97 chevy over 12 years ago,all he used in it was penzoil 10-W30,it has seen 338,000+ miles and the motor runs like a racehorse,havent thrown a rod or had a tick in it ever,keep up the good work pennzoil!

[This review was collected as part of a promotion.] I drive a full size suv and the oil made a noticeable difference within a month of me doing my oil change

[This review was collected as part of a promotion.] This is the only type I've ever used in my 2000 Durango. It's the best high mileage oil ever invented! We call it liquid gold! :)

i have been using penzoil since i could open a hood.i use it in all my trucks,like my father did .it extends the life of my 36 year old ford motor ,i never have a concern about it not starting thanks to penzoil

At 5,000 miles oil is still yellow! Never a hiccup or concern with the motor on any of my vehicles (1968,1986,2001,2004). Good for any generation motor and make! I will never switch brands and I suggest it everywhere I go!

I use this product in my 91 safari van as it has over 150 thousand miles and we drive a lot so I try to protect the engine as much as I can! Thank You Pennzoil!

[This review was collected as part of a promotion.] I've been using this oil for the last few years, last few cars were older and had lots of mileage, I found this to work the best

[This review was collected as part of a promotion.] I run the high mileage oil in my 1983 Mercedes Benz 300D with 250,000+ miles on it. Keeps everything working like a car with over half the mileage.

[This review was collected as part of a promotion.] Been using this oil ever since I started changing my woman's 02 Expo with high mileage! Barely burns the oil & nice to know it helps clean the engine :D

[This review was collected as part of a promotion.] My son does all my oil changes and we have alot of miles on our vehichle! Penzoil is the only product he has us buy to use!!