Valvoline Premium Blu vs Valvoline 5w-40 synthetic
Which oil would you use in 2003 6.0 power stroke?
I can get a good discount on this oil so I decided to ask you guys / girls
If you advise me not to buy this oil then will I not buy them.

I live in Iceland, where the temperatures goes down to minus 20 degrees up to 20 degrees in temperature.
Tires under the car are 46 "Mickey Thompson with 4.88 diff.
The car does not pull much weight , but often in the winter time I go on the truck up on the glaciers and mountains and the psi level in the tires often down to 2-3psi.

 

Many 6.0 owners have used the Valvoline premium blue 5w-40 with good luck. I tried the 15w-40 and hated it, my truck ran immediately worse than the rotella 15w-40 I took out of it.

 

If that is Celsius temp, it would be -4F to 68F for anyone with good advice for that temperature range

Keith

 

i only ran the premium blue in my cummins tryed it once in me 6.0l didnt like it switch to the rotella t6 5-40 synthetic and love it rotella t6 is the only oil ill run in any 6.0 i own

 

Premium Blue is a 15W40 oil, Premium Blue Extreme is the 5w40 synthetic. The synthetic in my 2006 works great, for your temps run the 5w40.

 

Oki thanks guys. I´m going to try Prem.Blue.Ex 5W40 synthetic. And put REV-X in it.

 

Ok, that makes sense, I've seen people call it the premium blue and never made the connection. The 15w-40 sucks in our trucks.

Good call!

 

I know i know, its expensive, do you and your truck a favor, at least run normal rotella. I run rotella t6, and my truck couldn't be happier

 

 

I would try Rotella T6 if I would found it here home in Iceland but I have not found it yet.