July 30, 2022 at 12:35 pm #717570
I got my duramax July 28, I’ve seen many break in versions and “drive it like you stole it” break in. I now have 125 miles on it. After reading the many versions of break in I read the manuals with the pickup. First the Interwebs versions, 1) drive it like you stole it, 2) no constant speeds, no full throttle take offs, no down shifting to slow, don’t dynamite the brakes for 500 mile, 3) same as (2) except for 1000 miles, and 4) same as 2 or 3 except not over 55 mph either. I think there were other versions also. What the owner’s manual says, nothing about “don’t go over XXmph, do not drive a constant speed fast or slow for 500 miles (salesman said no cruise control), no full throttle starts, do not downshift to slow the pickup. Avoid hard stops for 200 miles to seat brakes, do not tow trailer during break in. That is in the “Owner’s Manual”. It doesn’t refer you to the duramax supplement like it does for other engine related subjects. A couple things: treat your engine “nice” but don’t baby it for 500 miles and second, where do all these different versions of break in come from?
July 30, 2022 at 7:08 pm #717575
Congrats on your Duramax man! THE BEST engine imo, and I’m talking about the 3.0 B-Diesel BEAST.
OK, SO forget about the bullschiit in the manual, here is what we’ve done going on our third Diesel.
When starting up, let it idle for a minute to get the oil all over the engine. Then start out normal, but don’t push it hard acceleration wise, keep it normal.
On your commute if you have hills and dales like we have here in Seattle, great. Going up and down roads does a lot to train the computer in what your normal driving environment is, and it will teach the engine and tranny your traits.
And every two weeks take it out on a 100 mile trip, (50 miles one way, then back). USE the cruise control to teach the computer the lay of the land,BUT vary it as your cruising. Set it at 70 for 20 miles then bring it down to 66. Then turn it off for the last 40 miles and let it learn your foot.
What your trying to do is allowing the computer to teach the engine and tranny howto work together. And it does work.
I just went past 2400 miles and I went from a combined mpg 2 weeks ago of 28.1 to my fill up today and a combined mpg or 29.3, a significant positive change.
And also, at slow residential speeds you might feel the tranny lurching a BIT. Do get freaked out, it’s nothing wrong, just the computer learning the different scenarios of your driving habits.
We’ve done this over w. Vehicles and now my new RST 1500 3.0. And every one has turned out to be trouble free. Out 2008 5.3 V7 Silverado had 80k miles on it and was as solid as it was brand new!
So there’s my real life take on it. Just try and BECOME a part of your vehicle and name her.
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