Most guys are having really good results running bypass filters from what I have read...I think most of the guys running them change oil based on oil analysis results.

steved

 

I just change the oil in my 06 CTD. I used Valvoline Premium Blue Extreme. Valvoline says it will increase your MPG. I am averaging 17.80 before the change I will see what happens.

 

DREW,

I heard rumor it is harmful on your engine when you jump to different oil. Is this true or just a rumor?

thanks,

JARED

 

According to a link that someone posted here, Cummins says not to run synthetic oil until after 20K miles.

 

Correct. Based on links: one, and two, Cummins does NOT recommend using synthetic oils during the break in period, until about 20,000 miles, on "a new or newly rebuilt engine", "to allow proper seating of the piston rings."
As far as change intervail, as per the Cummins website, when you use CI-4 or CH-4 oils (see my post here, post #2), you can go 15,000 miles on an oil change with the Cummins Ram engine. However, if those are not available, you can use CG-4 oils, but, change intervail will be 7,500 miles.
Of course, changing more often that that will not hurt anything.
Not true.