Break in period?

[IDIABUSE]

[ QUOTE ]
IDIABUSE- do you happen to remember the color of the media was it white or brown?

Answer- Yes it was white.

IDIABUSE- have you seen the bypass adaptor for 6.0?

Answer- Yes I have. Does it prevent oil from being diverted to the byass when at idle or at low rpm?

[/ QUOTE ]

I dont think so it is set up to use bypass filters only.
oil pressure from OEM filter cap feeds into bypass filter
returned to valve cover cap.
some have used the dual filter element one full flow and one bypass which wont handle the volume that the 7.3 6.0 engines can deliver.
the billet caps end the confusion of past adding bypass filters to the newer light/medium diesel engines.

[ncmallard78]

you monkey, he wanted to know when the truck is broken in, not "what is a super sweet snake oil that i can run in my truck." at 20k, the truck is just starting to loosen up. at 100k i would say that it is broken in. amsoiililll is opitional.

[Rich807]

I think some folks are missing the point a little bit (understandably due to the original poster and passion he ignites) in regard to the differential comments.

It doesn't matter that the differentials come from the factory with syn. If you want to be anal about your rig you'll want to dump out ALL the break-in oils (original fill stuff) in order to prevent unneeded ware from metallic break in debris floating around suspended in the oil.

The orginal fill oil is good synthetic oil but when it has a bunch of break in debris floating around in it it's a moot point. Most guys don't keep a vehicle long enough to have a differential problem one way or another but again, if you want to be anal and have your stuff maintained to the max then you'll want to change out all the original fluids after a reasonable break in period.

[ronk54]

Back of topic - Yes, it can take 20,000 to 30,000 miles to really get the motor completely broken in.

I'm am on my 3rd Powerstroke and it took that long before the fuel miliage really completely stabilized and really improved to it's highest point.

[LittleBigRig]

[ QUOTE ]
The orginal fill oil is good synthetic oil but when it has a bunch of break in debris floating around in it it's a moot point. Most guys don't keep a vehicle long enough to have a differential problem one way or another but again, if you want to be anal and have your stuff maintained to the max then you'll want to change out all the original fluids after a reasonable break in period.

[/ QUOTE ]

You hit the nail on the head.


And to answer the original question...
It took me about 20k for the MPG to really stabilize.
Now at 60k+ I am seeing 22-23mpg. Once a month I fill the tank to the neck two fuel stops in a row, divide the miles by the amount needed to fill to the same point to get the mpg. This has been anywhere from 3-10mpg different from the overhead idiot display.