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Engine Break-In

 
View Poll Results: How would you break-in your new/rebuilt motor?
Easy Peasy (conservative) 4 66.67%
Hard and Heavy (seat those rings!!!) 0 0%
The Middle Path (what new engine? drive it normally...) 2 33.33%
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Old 11-30-2011, 10:55 PM
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Engine Break-In

So as some of you know I bought a 2012 Civic Si; it has almost 1,500 miles on it now... As is my nature I researched engine break-in AFTER breaking the engine in... The wife wanted to baby it to more of an extent than I (though I was also an advocate of taking it nice and easy); as usual, she got her way (that's why the 2012 civic isn't a 5th gen...)

We drove varied speeds and as "normally" as you can limited to 4,000rpms for 1,000 miles... then we took it to 5,000rpms until a 1,300 miles oil change to synthetic... since then we have used vtec quite a few times and driven it a little harder overall.

After reading the below pages (and other sources around the web) I started wondering what, if anything was "best"... I doubt that it matters much, but I'm curious to see what PZ thinks.

"machine tools leave ridges and peaks in new or freshly honed cylinder bores, and the piston rings polish them off while conforming to the precise shape of the cylinder. He asserts that at light throttle openings there's insufficient cylinder pressure to force the rings out into full contact with the cylinder wall, which leads to uneven wear that allows exhaust to blow by the rings and contaminate the oil. The site suggests that improved compression can boost power by between two and 10 percent." (quote actually from motortrend link).
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power

"I rang up long-time GM engine guru Dave Lancaster, and he agrees that in smaller, low-cost air-cooled engines (which expand and contract more as temperatures change) such a technique might indeed pay off. But the microfinished bores, high-tension rings, and precision-build tolerances in today's automotive engines yield excellent ring sealing from new, so any change in power output attributable to such a radical procedure would be miniscule if measurable at all. He notes that power and fuel economy generally improve throughout the break-in period as friction diminishes in all moving parts. Ford's engine durability specialist Mike Herr concurs with all the above as do the engine R&D experts at Honda....
Read more: http://www.motortrend.com/features/e...#ixzz1fFdziG4O

"Motoman counters by arguing that the fine machining and high-precision build quality of modern engines serve only to shorten the window of opportunity to "seat the rings," making it even more important to do the heavy-duty accels right off the bat. But if his procedure works, why don't manufacturers perform it in the plant on a dyno, especially on performance engines like the handbuilt Corvette LS7 and supercharged Northstar? They would, but Lancaster and Herr confirm the only engines that get such treatment are those undergoing torture-testing during development to ensure that the Motomans of the world won't ring up big warranty claims."
Read more: http://www.motortrend.com/features/e...#ixzz1fFii4jVF

http://www.popularmechanics.com/cars...k-in-a-new-car

Last edited by mr_y82; 12-01-2011 at 08:27 AM.
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Old 11-30-2011, 11:12 PM
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Re: Engine Break-In

drive it easy then
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Old 11-30-2011, 11:16 PM
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Re: Engine Break-In

Well, we did... maybe overly so... either way it's too late now with 1,500 miles on the car!!! Now all I can do is relax, have a homebrew, and drive (though not necessarily in that order)...
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Old 11-30-2011, 11:31 PM
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Re: Engine Break-In

i dont get why it would be bad to baby the car for longer
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Old 11-30-2011, 11:41 PM
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Re: Engine Break-In

based on what I am reading, it's probably not... but probably not necessary either. I was just curious to see any opinions that might be hanging around PZ. :)
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Old 12-01-2011, 12:25 AM
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Re: Engine Break-In

You should have let the original oil in there for 5000 miles, then use whatever oil you want. For lightweight high output engines, abuse and baby are the same thing as long as you warm up the oil first. The owner's manual usually have the best advice. As long as the oil gets to do it's job.
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Old 12-01-2011, 12:28 AM
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Re: Engine Break-In

Well damn. The synthetic is in there now, I guess it's staying... When the sales guy was talking about "honda break-in oil" I didn't think much of it since he didn't even know that the new civic si had a k24, or that 24 was indicative of the displacement... regardless, I should have asked PZ BEFORE I acted... I thought 5,000 miles seemed like a long way on the original oil... I thought it would be carrying metal and such...

Last edited by mr_y82; 12-01-2011 at 12:33 AM.
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Old 12-01-2011, 01:26 AM
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Re: Engine Break-In

ON a fresh Honda engine? Never! They build the engine on Mobil one, and run the engine before dropping it into the car. The break in period is a cinch if you commute daily. The synthetic is fine man, just make sure no "Red Lines." And follow the intervals in the Owner's Manual
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SURGEON GENERAL WARNING:
THE IMITATION OF ANY OR ALL MANEUVERS EXECUTED BY A BA B20A 4WS PRELUDE IS HAZARDOUS TO YOUR CAR'S HEALTH. DRIVING A PRELUDE MAY CAUSE LOSS OF INTEREST IN OTHER CARS, WOMEN AND SPEED LIMITS. OTHER SYMPTOMS INCLUDE SLEEPLESS NIGHTS, COLD SWEATS AND OTHER SYMPTOMS RELATED TO ADDICTION. IF THE SYMPTOMS PERSIST,DRIVE!
Prelude: Because all great stories have one. Just like Honda.
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Old 12-01-2011, 02:12 AM
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Re: Engine Break-In

X2 you should've left the original Honda oil in for about 3-5k miles. My friend who once was a Honda technician said that from the factory, the first oil that goes in is special oil lol..
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Old 12-01-2011, 02:28 AM
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Re: Engine Break-In

u should have just taken all the oil out and dont even bother to add new oil cuz that special oil from honda is good enough for atleast 8-10k miles
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Old 12-01-2011, 08:23 AM
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Re: Engine Break-In

lol... I'm not 100% sure where the serious comments stop and the sarcastic ones begin!

I don't think we have red-lined it, but I came close while passing AFTER the oil change... who knew an escort was going to attempt to drag race me from a dig when I was in a merge lane?...

We plan on changing the oil around 5,000 miles (maybe we could wait longer since that will only be 3700 miles on the synthetic)...

I take it you guys are serious about leaving that honda oil in, but I also detect a bit of sarcasm at the idea that it's "special"... anyone care to clarify???
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Old 12-01-2011, 09:04 AM
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Re: Engine Break-In

You have a brand new car bro. You would definitely benefit from all the information that is on the - Bob is the Oil Guy website. I work at Mobile1 and we say that conventional oil needs to be changed at 3000 miles... To be honest, thats bs. A good conventional oil like ours can last into the 5000 mile range. Since you have synthetic, you could go past the 5000 mile range easily!!! Check out the site tho. It's a plethora of knowledge.
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Old 12-01-2011, 09:37 AM
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Re: Engine Break-In

Ahhh Phooey!

Listen to the owners manual. If you have a "maintenance manager" system, follow it for the first "oil change interval" and keep a bottle of 5w-20 in the car. Eyeball your oil stick every 500 up to 5000 miles.

Everybody should just monitor the oil themselves because computers are just guessing based upon what info passes by the sensors, not by oil realtime degradation. The Honda V6 with cylinder shutoff are not the same as the 4 bangers.

The oil initially is built to micropolish and surface left rough in assembly. You changed it already, so the point is moot. Stay synthetic with a great filter and mind your dipstick! If it wasn't important, they wouldn't include it!
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SURGEON GENERAL WARNING:
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Old 12-01-2011, 10:03 AM
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Re: Engine Break-In

"break in" periods are not a important task anymore. Engines are broke in and the rings seat within minutes of the first run. Nothing to be scared of just go drive it and be happy you have no timing belt interval. Lol
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Old 12-01-2011, 04:53 PM
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Re: Engine Break-In

drive it like you stole it, just so it knows what it's in for. lol
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Old 12-02-2011, 12:48 AM
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Re: Engine Break-In

^hehe

Abstract, I agree 5,000 is fairly low mileage for synthetic... but even at that interval it's only a couple changes a year and it makes me feel better. :) I've perused bob's stuff before... good info.

Sideswipe, the 2012s call for 0w20! Another mpg thing ford, honda, and I assume others are doing... Thanks for the info on the honda oil... checking the oil is a will do... 200K+mi h23a1 trained me for that task... it drank a quart every 900 miles or so (of 20w50) before I swapped it... I'd guess it wasn't cared for like I care for my cars. I still write all my maintenance down... I won't even pay much attention to the car's feature... seems like the silly thing said we had 8500 miles to go (or maybe it was based on a 7500mi interval)... either way I'll stick with 5,000mi and/or ~6months intervals (not a truly closed system after all...)

Blaclabel, the good sources I ran across seem to agree with you, and I agree that timing chain will seem like a blessing so long as it never manages to let go!

I haven't even taken my own poll because the options seem kinda stupid after more research... I should have put as per the manufacturer's directions on there...

Thanks for all the input.
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