Why do people still hate Pennzoil?
Penzoil is practically the worst motor oil out there. I dare say it is the single WORST name brand oil available on the market. Let me state that I do use some oils that would be classified as "botique oils" but I don't use them for everything. I use Royal Purple or Red Line for gear oils in my rear ends and transmissions and my dad loves Amsoil for motorcycle use. For day to day use, I use the Ford Motorcraft oil in my Fords and Mobile 1 synthetic for my mom's benz. I know Mobile 1 isn't as good as it use to be but its still a [censored] good oil by compairison. Castrol GTX or synthetic isn't bad, I have friends that swear by it and havn't found any problems when they have torn down a motor. Shell Rotella T is good stuff for motors with lots of load on them. A friend of mine uses it in his work trucks. I'm not sure if that oil is better suited for a desil motor or not.... I can't remember. I've never heard of any problems with Valvoline but I havn't looked. If you change your oil every 2500 miles with regular penzoil you will be ok, leave it in for 4000+ miles regularly and I would be shocked if you didn't have sludge in your engine block. I've seen what years 5-10 years of penzoil does on the inside of engine blocks in person and it is NOT PERTY. Bottem line, don't buy this [censored].... it sux. Flame me if you want but I'm just trying to save yer motor.