Break-in Period

[Snox801]

Never do early oil changes early either.i go by fords recommendation of every 5000 miles.that includes the first one. If Ford thought it was a good idea to change oil earlier they would recommend it.

Question does ford actually say 5,000? I thought most people were seeing like 7500 miles between changes.
5000 technically is an early change for mine. I did oil analysis at that and they said I had 2500 more miles or more left in the oil.

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[Tim d]

You forget ford also is aware of expected lifespans. Those are what they expect thing to last over a certain time. Which they certainly will. But this could potentially extend past those expected lifespans of ford.
So if you don’t plan to keep it for the long haul. You are correct no need to do it. But it is a better option to change early.
You will never hear an aftermarket engineering firm or builder not recommend it. You will also never see an oil analyst not recommend the early oil change.
Different interest at had for both parties. One had an interest in making a product that last an acceptable amount of time then sell you another. One is only interested in making your engine live longer.

Good points. I have two 16 year old dodges bought new that I have done factory recommended oil changes. My caravan is typically a half court low doing changes at 3000 mile intervals and it has 177,000 miles on it. The trans fluid is lifetime,I've never had it serviced and trans is fine. my ram only has 41,000 miles on it . Also have a 53 year old cuda I have owned 35 years. I change the oil on that once a year,every spring,typically around 1500 miles. Uses no oil at 157,000 miles. One would think the manufacturer would recommend changes to promote longevity of said vehicle so people purchase that vehicle. I hope my Maverick is as reliable as my mopars!

 

[Tim d]

Question does ford actually say 5,000? I thought most people were seeing like 7500 miles between changes.
5000 technically is an early change for mine. I did oil analysis at that and they said I had 2500 more miles or more left in the oil.

5000 for ecoboost.

 

[Snox801]

5000 for ecoboost.

Thanks I didn’t read the book. Just assumed it was based off olm. I’m about to do
My 50k mile oil change and I am running the olm to 0 this time. I will send in a sample to see what it does.
Have a great mix of towing long haul, city, winter cold starts, long idles, and highway trips. This should be the worst case I could give my ecoboost. Oh and also ran e30 for a decent amount of time.
We shall see if the 7500 mile olm is correct for my truck.

 

[HeyBales]

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?

So you have a hybrid - so the engine has probably only had about 300 miles on it so far.

Now you are about to tow so likely it'll be engine only now.

But for only 100 miles?
Heh - vary the load best ya can - speed, ect.
Ya, it can still be important - why they include it in the manual (and why you now know you can't trust the dealer folks to be educated or care to look things up before they speak).

Also - that ICE run times plays into OLM estimate of oil change, or 1st break-in oil change.

I'd suggest before you tow - get off the app the OLM %, and miles to change, and date.
Then after your 100 miles of towing, which is no longer non-extreme standard driving - see what the figures change to.
You might be interested to see how they update.

 

[William Buckman]

So !
My filter is not able to filter out metal shavings ? If the metal shavings are so heavy the pump can’t push them to the filter they’ll settle prolly on the drain plug magnet, although I’ve never seen such.
I find that hilariously funny. I’m sorry,
But I’m a guy who’s takes multiple engines past 350,000 miles. One past 500,000 one to 394,000.
Without early oil changes.
But I don’t know what I’m talking about.
Pay me no never mind.

Many internal parts of your engine and the block are aluminum, which are not magnetic. I worked at Toyota factory in powertrain. I've worked assembly, machining, and QC testing the endurance of engines. The tolerance for internal parts was +or- 25 microns ( there's 150 microns in hair diameter). It's the aluminum that will tear up the crank, con-rod bearings and wall of the cylinders.

Glad you got great milage from your vehicles. Just giving a different point of view. Have a blessed day.

 

[Bad_Bob]

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

One of the guy's that taught me to build engines in the 1980's build engines for racecars. First thing we did after the high idle to seat rings and after initial valve adjustment was go run 1/4 mile. If there was a problem you found it quick.

 

[LuckyLeperchaun]

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?

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?

I bought my truck which is a 2024 XLT AWD new on July 19, 2025. I plan on doing a 1300 mile oil change for a break-in . Not only because the new engine parts are under a higher friction load and creating a higher heat from that friction load. Also because it's a 2024 and that oil has been sitting there in the engine stagnant since it was first put in at the factory, and at the dealer as it only had 8 miles on it when I bought it.
As for me for a full synthetic oil change cost, it's worth it for the reasons above, and the peace of mind - but also if for some reason there are micro metal shavings, I want to get it out and catch any irregularities now rather than later. Also to get that fresh oil in there to lube things up because the oil has been sitting for months . Then from the point of that 1300 miles change, at least I know the friction points in some parts that cause more heat in breaking, will no doubt have those areas and the engine in general running cooler and freshly lubed.
I plan on running a full synthetic motor craft engine oil and filter. This is my 2 cents for piece of mind!!

 

[Cancunbadlands]

The manual book statement there is a 1000mile/1600km break in period, you'll be alright

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