My daughter bought a different brand of oil and my car didn't run well bought the Pennzoil conventional and it performed better.

[This review was collected as part of a promotion.] Bought this for oil change for my truck. Only brand I trust

[This review was collected as part of a promotion.] great oil use it all the time perfect for everything

[This review was collected as part of a promotion.] i use pennsoil in all my lawnmowers and all my cars

[This review was collected as part of a promotion.] I think it works good and i would tell all my friends

[This review was collected as part of a promotion.] Been running in all my vehicles for years great value

[This review was collected as part of a promotion.] This is all put in my van its awsome runs really good

[This review was collected as part of a promotion.] I have always used this oil. It has never let me down

[This review was collected as part of a promotion.] Use in my vehicles all the time. Works great, engine runs smooth.

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