I run the Blue as well and at my local Parts American its 7.99/gal

 

I run Premium Blue ($10) and blend it with Extreme ($16) when they have it. I like the Cummins "C" on the bottle and the blend gives my turbo a little extra protection. I have always been a Valvoline fan.

Pete

 

I run the premium blue the first 20k and then went to the extreme and have been running that ever since (66k) and haven't had any problems, last sample was right in line.

I got a question for for you guys, Does it cause any problems to be switching oils with the seasons i.e. premium blue "extreme" in the winter vs premium blue in the summer?

T398

 

someone with more info please chime in, but i thought once you switched to synthetic you should stick with it and not go back and forth

brett

 

Is the new Rotella "no ash" oil out yet ? I think it is called Rotella triple something .

 

No, there's no problem with going back and forth.

 

Never used blue but I have rotella t full synthetic in the 98.5 the 07 will be getting the same at the first oil change and for ever more. I have been paying around 17.00 USD per gALLON

 

Been running blue 15w-40 since brand new, 90,000 km. Excellent stuff !

 

I think they will come out with a low ash blend that will be even better

 

Most of you probably aready know this but for those who do not the rotella T 5-40 and valvoline Blue Extreme 5-40 are not true synthetics. They are super refined mineral oils which still have the resins in them just like any regular oil.

I don't beleave in useing expensive full synthetic oils but the fake synthetics are so close in cost to a real full synthetic why not use a full synthetic. That's not a question, just a retorical comment.

 

I run Rotella T 15W-40. I know someone who was running Rotella synthetic in his Cummins and couldn't figure out why mine and my bosses trucks were noticably quieter at all RPMs but especially at idle. He ditched the synthetic and switched back to the real stuff like us and what do you know - nice and quiet again. My boss runs a lighter weight synthetic in his when he goes to Canada snowmobiling but here in Maryland it doesn't get cold enough to justify switching IMO. The manual says 15-40 is fine down to 0 degrees and you don't see that around here unless its a rare couple days and you factor in wind chill. Just my.02 - doesn't seem to be worth the extra $ for synthetic.

 

Well I just paid $23 for extreem.. funny the 2006 specs say first oil change is at 15k miles.. but it looks too dark and gritty for my task.. so he we go with extreem..

What the h.. its only a truck

 

15K is for the "light-duty" schedule. The severe duty maintenance schedule (which applies to almost everyone) says to change every 7500. I change mine every 5000. How many miles do you have on yours? I think your supposed to stick with regular for at least 20,000 till the engine is broken in before switching to synthetic but im not sure - just what ive heard. Fill out your sig so we know what you got.