dlstewart01

Quaker State and Pennzoil have been owned by Shell Oil since 2002. Completly different formula than was used in the old days....

Phantom

iTrader: (16)

dude...don't start...i know...

dlstewart01

Not starting anything, just stating facts......

dlstewart01

double post, sorry.

Phantom

iTrader: (16)

i use pennzoil platinum myself...was just wondering because a couple engines i've had apart that used quaker state looked like that...not bad just staind

dlstewart01

Pennzoil platinum is very good oil as is Valvoline synpower. I use Castrol Syntec, 0W30 the European formula, (German Castrol)

I have never used Quaker State but have used Pennzoil. I have seen the varnish develop using Castrol GTX but then again have seen very clean engines with the GTX. I don't think the varnish is anything to worry about. Its not harmful.

have a good one.

Phantom

iTrader: (16)

i also use a mixture of castrol gtx and valvoline syn power oil treatment(can't find it anymore)...10oz of the treatment to 6qts of the gtx...makes a nice formula

colekill

I can’t tell you how many different types of oil have been in that truck. But for the last two years it has been mobil1 synthetic and mobil1 synthetic high mileage