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Clarification on 2022 6.4L owner's manual on engine break-in

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JimKIII

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I'll be picking up my new 2500 Big Horn from MD sometime in January and driving back home to the NW, ~2,500 miles. I want to make sure I follow the correct engine break-in procedures because I've got a long way to go to get home and the drive will be a great shake out of the new rig.

As per the 2022 6.4L manual under 'Engine Break-in':

'Drive moderately during the first 300 miles
(500 km). After the initial 60 miles (100 km),
speeds up to 50 or 55 mph (80 or 90 km/h) are
desirable.'

Everything is clear as a bell - except, 'After the initial 60 miles...'. So, I suppose the manual writers assume I know what constitutes moderate driving during the first 60 miles. Well I don't. So will someone elucidate to me how I should drive the first 60 miles when I leave MD? Do I creep along at 35 mph on back roads, drive around town stopping and starting at all the lights for a couple hours, or what? When I got my new Harley years ago the common reply to such a question was, "start the engine, let it warm up for a couple minutes, then drive it like you sole it!" Well, I'm much older now and not as wild - I just want to make sure I treat this new 6.4L right.
 
The engines are run and basically "broken in" prior to the truck leaving the factory.

About the only thing left to "break in" is to set the rings, which is done by loading and unloading the motor. that will happen in normal driving.

For me, I say drive it like you will be driving it on a normal basis. I was told this by a engine builder years ago.

My '04 Chevy truck has 140K miles on it. We didn't baby it at all. And she still runs strong.
 
yup just drive it like you normally would. no need to keep it under 50mpg. vary your speeds with some mild accellerations and deaccellerations. most 2 lane roads will cause you to drive normal which is good.
 
As others have stated the engine is pretty much good to go. Just vary speed and RPM

The break-in procedure in the manual is more for ring and pinion break in. The gears need time to work against each other and wear in as well as go through a number of heat cycles.
 
Crusty old shellback said:
The engines are run and basically "broken in" prior to the truck leaving the factory.

About the only thing left to "break in" is to set the rings, which is done by loading and unloading the motor. that will happen in normal driving.

For me, I say drive it like you will be driving it on a normal basis. I was told this by a engine builder years ago.

My '04 Chevy truck has 140K miles on it. We didn't baby it at all. And she still runs strong.
Click to expand...
Thats a terrible comparison as those LS engine will go forever regardless lol
 
H3LZSN1P3R said:
Thats a terrible comparison as those LS engine will go forever regardless lol
Click to expand...
WFO from the moment they leave the lot
I've taken plenty new GM's and Fords to the race track with a couple hundred miles on them, they like it hahah
 
I guess the dealer should never give test drives on any new lot vehicle. I've never seen a "you can't drive 55" sticker plastered on the steering wheel during any test drives, lol.
 
Just drive normal. If you hop out on the highway immediately just vary the rpms. Don't just set the cruise at x mph and leave it there. After a 100 or so. Do what you normally do.
 
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