Current Honda Factory Fill

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Originally Posted by paoester
Originally Posted by hallstevenson
Follow the OLM from day one. There is no break-in period on modern Hondas or most other vehicles.
Not true.

Lots of 2018 & 2019 Owners Manuals specifically mention break-in procedures. Modern lapping and honing are not perfect, although better than 1970.

Did you miss my comment about "or most other vehicles" ? That isn't all-inclusive. Some vehicles will have break-in specifics, but not all.
 
Originally Posted by hallstevenson
Did you miss my comment about "or most other vehicles" ? That isn't all-inclusive. Some vehicles will have break-in specifics, but not all.
"Most" isn't right.
"Few" would be a better term, so just the opposite of what you said.
And you're pretending modern honing & lapping is a perfect process. Its not. Just better than 1970, like I already said.

For example, Ford, GM, VAG, FCA, BMW, Hyundai, Kia, Mercedes, Toyota, Nissan, ALL say to break in the engine.

BMW's basic instructions match just about every engine on the planet's instructions:
"Doing an engine break-in used to be a standard procedure with new cars. And it's still the case that you should avoid running the engine at high RPM for the first 1,300 miles. Experts recommend a maximum 3,500 rpm and 90 mph in diesel models and 4,500 rpm and 100 mph in gas models. This will give the engine and transmission sufficient time to adjust to each other. Once you've reached the 1,300-mile mark, you can gradually increase your speed and your engine's RPM. In particular, avoid to put too much strain on a cold engine. " -- https://www.bmw.com/en/automotive-life/break-in-a-new-car.html

From https://www.cnet.com/roadshow/news/break-your-engine-in-the-right-way/



breakinprocedure.jpg
 
My 2019 Civic hatchback sport-the OLM at 30% with 3200 miles,city driving.Not going to wait for 15% OLM,maybe doing it again at 30%.
 
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