This new truck is amazing!! getting almost the same mpg's compared to the old '97 i sold. i cant be happier. what is everyone doing for there oil?? conventional or synthetic? im pretty loyal to Amsoil products but im leary about putting synthetic in so soon.

 

i put in Synthetic at 5000. I used Mobil 1. It is still running with no problems.

 

Cummins says at least TWO oil changes on the invertals they recomend.I waited to 15k

 

My 2006 Dodge owner guide said to wait until 25000 miles before I could put in synthetic oil.

 

Which Mobil 1 did you use? The only Mobil 1 for the 6.7 out now is Delvac 1 ESP 5w-40 which I can't find locally. The only place I have found it is http://www.avlube.com/


Mike

 

Mobil 1 ESP 5W40

 

That was the stuff

 

my owners manual said that using synthetic right away was ok but i still have doubts. thanks for input

 

amsoil has there product for our trucks also http://www.amsoil.com/storefront/deo.aspx

 

I have never used synthetic oil in my trucks and would like to know how many miles do you go between oil changes using the synthetic stuff? I am going 6000 miles with Shell Rotella 15w40
BTW I have a 07 5.9 if that makes any difference!!

 

There are differant groups of synthetic oils.Group 3 and Group 4.The Group3s are less money,flow good cold and protect hot.What they don't do is have the ability to go as long as group 4 oils,the more costly.The Rotella synthetic is a group 3.More reading on www.bobistheoilguy.com

 

Last time I checked the Rotella 5W-40 Synthetic is still not a CJ-4 rated oil which is required for the 6.7s and other 2007 DPF equipped trucks. This is based on what WalMart has on the shelves as well as what Rotella was publishing on their website a couple of weeks ago.

 

Anyone ever try Royal Purple synthetic oil?

 

I use royal purple in my dart and yukon so far. The stuff seemed great, it really made the solid cam and valvetrain noise in my dart a lot more quiet. Seems to me that would be better. It did not improve mileage in the yukon, but I still use it.