intense3123

At my work we have 2 types of oil on tap. Mobil 1 0W40 and Pennzoil platinum 5W30. The penn is a full syn oil for those that don't know.

My reasoning tells me M1 is a better oil, but I also know that it is known for being somewhat of a thinner oil when compared to others. So is the 0W something to worry about?

What would you guys put in your car?

qwk93ta

iTrader: (13)

I use whatever syn. oil is on sale and change it every 5,000 miles.

blackfang

iTrader: (2)

I use M1 10w30 every 5k

AMitc31100

iTrader: (3)

i use to use nothing but m1 5w30 but now i use royal purple 5w30

SOMbitch

iTrader: (8)

M-1 is no longer a true synth as it is from a group III petroleum base since Exxon bought them out. PP is group IV base and true synth. PP is SUPPOSED to have great UOA's so that is what I now run or German Castrol when I can get it.

TXZ28LS1

iTrader: (5)

running castrol syntec 5w-40. really good stuff!!

Kingc8r

iTrader: (21)

I usually run Redline. I would run Mobile 1 over Pennzoil if those are your only two choices

Mr Incredible

I would use the PP. The weight is correct and screw M1.

383lt1impala

iTrader: (33)

castrol 5w30 every 3k miles on the lt1. i use castrol on everything.

RsSean

iTrader: (27)

Mobil one only.

L3THAL_Z28

iTrader: (5)

i use 5W-30 Mobil 1...but lately i've heard really good things about the Castrol oil so i'm going to switch

FUKALS1

Valvoline Durablend

have you guys seen the bearing tests from some of these oil companies you like? check this out... a little while back but still good knowledge: http://www.animegame.com/cars/Oil%20Tests.pdf