My dad would always buy this oil when changed our oil. Now that he passed we still use it till this day. Like they say daddy's are always right!!!

[This review was collected as part of a promotion.] Last longer than any other brand! And improved fuel economy.

[This review was collected as part of a promotion.] Use it all the time in my vehicles to keep them running smoothly.

I had purchased this oil after a previous owner failed to do regular oil changes on my car cleaned the sludge and keeps her running strong

[This review was collected as part of a promotion.] For years and years, I have bought this product and plan on to continue to do so!

[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.] Been using for the life of my 2004 Subaru Legacy. Still running strong.

[This review was collected as part of a promotion.] this is the only brand we buy for our cars, You can always trust Pennzoil

I have recently starting using it and it's seem like my truck is running a lot better than it was with castrol GTX!

I buy a case every few months because I do my own oil changes for my sisters and my cars, lasting product and very durable