Breaking In New Truck

Everyone I know says run it somewhat hard during break in. Close to 200k now after an inframe and no oil consumption. Bob tailed 10 miles and hooked on to 40k and drug it up and down the mountains on 81

 

I’m not sure if a semi is the same as a motorcycle but when buying a new bike they recommend varying the speeds and rpm’s
Not to just get in the highway and maintain one speed

 

Here is what the owners manual from my 1956 Studebaker Champion says about breaking in a new vehicle:

A break-in schedule gives new parts a chance to heat up and cool off, to rub against one another until they work smoothly as a team.
Besides moving engine parts, the transmission, rear axle and differential, steering linkage parts and brakes must also wear in.

Nothing has changed. Follow the Cummins recommendations. they have only been building and servicing these things for what 90 years?

 

was always told to break one in, you drive like normal.

 

Don’t forget the overhead around 60K ish. You will notice a difference.

 

I was told that these new engines you drive it like you stole it!

 

Unless the manual tells you otherwise, drive it during break-in the same way you're going to drive it throughout its service life so that the wear patterns reflect your driving style.

 

I’ve read a full range of normal driving. Cars manufacturers always suggested occasional short spurts of 3/4 full power. I’ve read that Diesels benefit from slight Lugging, Supposed to put side force on the cylinder walls, which is needed for good ring sealing. I’ve been doing all that with my 12.7. 90k on inframe. I’m hoping rings are still sealing up. Need to run overhead very soon. Hoping fuel economy improves. I’ve ran it hard,

 

This^^^
Jump in and drive it like you stole it.