Break-in Period

[Cheechako]

When I bought my truck, about a month ago there was no mention from the dealer about break-in period. Pay, use regular gas and go - were the only instructions. Reading the manual (that they don't give you) I see there is a 1000mile/1600km break in period that you are not supposed to tow anything, or drive hard.
I need to tow a small trailer about 100miles and I have about 60% of the mileage covered. I never push the vehicle and I am wondering how important this break-in period is for these larger complex gas engines. There seems to be no other requirement except to "take it easy" and don't tow. Will I be doing any harm if I tow a small trailer easily with only 60% of the mileage covered?

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[Tbone289]

You basically just don't want a huge load or high rpms during that time. It's most likely broken in by now anyway. I would not hesitate at all to tow a light load at 600 miles.

 

[JC 2024]

Wondering if first oil change should also be at 1,000 miles

 

[Snox801]

Yes the break in is simply to try and reduce the cost of damage if something did go wrong.
My uncle was actually one of the top engineers for automotive drivetrains at Dana corporation.
He always said that after just a few heat cycles things are as good as it gets.
He also always did his break in on a dyno for all his engines. Heavy load and high rpm.
He basically said that the low rpm and “break in” was more of a risk management.
I also believe the owner of livernois also straps his new ride on the dyno and runs the crap out of them.

As stated above I would not worry or hesitate in the least to do light towing.
At 600 miles you are good to go.
I don’t think I’ve ever made it more than a few miles before wot. Never had an issue

 

[Snox801]

Wondering if first oil change should also be at 1,000 miles

I would 100 percent. Lake the motor oil geek. Recommends that. Get all the stuff out new in.

 

[Tbone289]

I did my first oil change at 750 miles with "full synthetic" and have no regrets in doing so. My oil analysis results are excellent. I did a lot of RPM variation and load in that 750 miles.

 

[Probity]

When I bought my truck, about a month ago there was no mention from the dealer about break-in period. Pay, use regular gas and go - were the only instructions. Reading the manual (that they don't give you) I see there is a 1000mile/1600km break in period that you are not supposed to tow anything, or drive hard.
I need to tow a small trailer about 100miles and I have about 60% of the mileage covered. I never push the vehicle and I am wondering how important this break-in period is for these larger complex gas engines. There seems to be no other requirement except to "take it easy" and don't tow. Will I be doing any harm if I tow a small trailer easily with only 60% of the mileage covered?

As others have said - just use common sense. Don't 'drive it like you stole it', don't 'baby it for all the 1000 miles'. Unless you're planning on towing your max. loaded trailer weight (is yours 2k or 4k?) up steep BC Rockies grades for those 100 miles, you should be fine. Normal driving, vary your rpm if possible (I try and skip using cruise control for the xxx mile owners manual break-in). All the normal stuff. Have a safe trip.

 

[Tiger Dude]

oil drillers need jobs, buy oil often and early. Or just go fast and burn more gasoline. When to change oil will create a 10 page topic with zero consensus.

 

[Cheechako]

Ok, thanks everyone. I think the break-in period is a damage control thing (as Snox801 suggests), i.e. if there is anything inherently wrong with the new engine, then the damage will be limited by taking it easy. This inherent flaw should show up by (an out of the blue guess) by 1K miles. You are not actually breaking anything in, setting piston rings etc they don't even ask for an oil change (or may be the truck will at 1K miles?) so they are not even concerned about metal parts coming off of newly machined components.
Anyways I hope I am right! I'll just take it is easy until my first oil change and use the full range of capabilities of truck (easy) until then.

 

[Sig-vicious]

Lots of oil analysis data indicates there is much higher wear to the engine for the first multiple hundreds of miles. The oil from your first engine oil change will contain multiple times the typical amount of metal, compared to future changes.

This is from the engine breaking in, ideally done in such a way to prevent extreme amounts of localized heat, to reduce hot spots as materials undergo higher amounts of initial wear.

So I'd disagree on the claim that there's not higher amounts of component wear during break in. The oil engine analysis can even identity and isolate what items are wearing...piston rings, bearings, cylinders, etc.

But I'm not going to claim it all makes that much of a difference in the end. Millions of people have broken in their engines all kinds of ways and have had no evidence that their way was better or worse than the others.

I'm regards to your initial concern of towing, I wouldn't worry about it, with that much break in already done. But at the same time I wouldn't be looking to do 0-60 timing pulls or breaking land speed records during the trip.

 

[Snox801]

Lots of oil analysis data indicates there is much higher wear to the engine for the first multiple hundreds of miles. The oil from your first engine oil change will contain multiple times the typical amount of metal, compared to future changes.

This is from the engine breaking in, ideally done in such a way to prevent extreme amounts of localized heat, to reduce hot spots as materials undergo higher amounts of initial wear.

So I'd disagree on the claim that there's not higher amounts of component wear during break in. The oil engine analysis can even identity and isolate what items are wearing...piston rings, bearings, cylinders, etc.

But I'm not going to claim it all makes that much of a difference in the end. Millions of people have broken in their engines all kinds of ways and have had no evidence that their way was better or worse than the others.

I'm regards to your initial concern of towing, I wouldn't worry about it, with that much break in already done. But at the same time I wouldn't be looking to do 0-60 timing pulls or breaking land speed records during the trip.

I agree I have seen every different way of break in possible and the end result seem to not matter. I’ve had some 400k mile plus vehicles that never had a break in, just drove it hard.
then I’ve also seen very careful break ins not last.
Most wear is indeed in the first few heat cycles of the engine.
Just to much going on in between break in and the last firing of an engine to know.

 

[Tim d]

When I bought my truck, about a month ago there was no mention from the dealer about break-in period. Pay, use regular gas and go - were the only instructions. Reading the manual (that they don't give you) I see there is a 1000mile/1600km break in period that you are not supposed to tow anything, or drive hard.
I need to tow a small trailer about 100miles and I have about 60% of the mileage covered. I never push the vehicle and I am wondering how important this break-in period is for these larger complex gas engines. There seems to be no other requirement except to "take it easy" and don't tow. Will I be doing any harm if I tow a small trailer easily with only 60% of the mileage covered?

Your truck came without an owners manual?

 

[Oscarcat]

There are other components to consider during the "break in" period. In you hybrid there is the CVT. All-wheel drive components. Regen system and brakes.

That said, if you drive with a light foot, accelerate moderately, anticipate stops and brake lightly, you should be fine. Just don't piss off other drivers and pull over if you see a line form behind you. Although you Canadians have a reputation of being very polite. Hopefully that extends to pokey drivers.

 

[Scott Asheville]

Sorry for going off-topic. This is yet another topic of discussion/dissension that will vanish from the automotive world with the inevitable advent of BEVs. No break-in period. No oil changes. No transmission. No air filter. No catalytic converter or muffler. No timing chain. No alternator. No starter motor. No radiator. Eventually no 12v battery.

What the heck is gonna be left for us all to talk about?

ps: Please don't let my digression hijack this thread into another BEV war. I was just sharing a passing thought.

 

[Snox801]

Sorry for going off-topic. This is yet another topic of discussion/dissension that will vanish from the automotive world with the inevitable advent of BEVs. No break-in period. No oil changes. No transmission. No air filter. No catalytic converter or muffler. No timing chain. No alternator. No starter motor. No radiator. Eventually no 12v battery.

What the heck is gonna be left for us all to talk about?

ps: Please don't let my digression hijack this thread into another BEV war. I was just sharing a passing thought.

Don’t worry buddy, once that grift is over we will be back to exploring how to
Make cleaner better ice engines.

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