Proper Way to Break-in New Engine
 

I've done a lot of research on this and the best way to break-in a new engine is basically to drive it hard. I don't have the time to explain this but I encourage everybody who just bought an FR-S to do some research on the best break-in procedure. If you are babying your car you end up with slightly less power and an engine that won't last as long. Here is a good starting point: http://www.mototuneusa.com/break_in_secrets.htm

Thanks a lot !
Where did you get this from?:bs:

Oooooooor, do what it says in the manual and keep it under 4000 rpm for the first 1000 miles. I'm pretty sure Toyota and Subaru know something about the engine they built.

Delete thread!

FYI: The FR-S is not a 10 year old freshly rebuilt motorcycle engine. Apparently the FR-S is a CAR with an engine that is vastly different than a motorcycle engine. Also, when you get this car it will have at least 10 miles on it and the engine will have been tested at the factory. Your website is an awful starting point, it is for motorcycle engines with zero miles on them, and is full of hearsay. There is nothing scientific about it. Plenty of other bona fide sources, like, oh I dont know, Toyota and Subaru recommend the opposite. There are already at least two long and hotly debated threads on this on this forum. If you have actual data or research papers those might help, also try the search button. Sorry to be so critical but you should not trust everything you read simply because it is well written and convincing.

My guess is the reason the manual recommends a soft break-in procedure is because they don't want to make it company policy to be recommending that people hot-rod the car... also, a proper hard break-in is very specific and riskier than normal break-in if not done properly, and people can't be trusted to do it properly.

@Dave-ROR I SUMMON THEE!!!!!

http://www.google.com/url?source=img...znUqVcfhp_nszw

This topic has been beat to death already.

http://www.ft86club.com/forums/showthread.php?t=5618

c0rbin, I went with your method back when I was a teen. My Dad kicked my A** when I spun a bearing in my civic si hatch. Think I will stick to the manual.

Excellent!

I've had over 20 new cars and I have always been gentle with them for the first 1000-1200 miles and have NEVER had any mechanical problems. I also changed the oil every 3000-3500 miles.

There's already a break-in thread. And it's stickied.

But to add to this thread: It comes to what you want from the engine.

To get the peak HP sooner at the expense of engine longevity, follow the aggressive method above.

To get the most reliability and build up to peak HP later, follow the manual.

^ No, you just made that up. The same thing that gives you more power makes it last longer.

This is why break-in threads suck so much.

I scratched my balls every 45 seconds while driving my last car, and it never broke down on me over 140k miles. I am convinced that this is the secret to car reliability.

:w00t:

What if the driver doesn't have balls?

Never buy a car off a eunuch.

That's right, you heard me.

By scratching your balls you lift up on the accelerator thus giving the engine time to re-lubricate and cool down resulting in a car that is properly broken in and treated with gentleness. I think there is a cure for your itchy ball problem, but you would break down more. Decisions, decisions.:happyanim:

Every time this thread gets a post, god kills a kitten. PLEASE, think of the kittens.

Lol i broke mine in at the track ;)

Awwwwww Yeahhhhhh

I'm sure if you follow this guys advise and blow your engine, he'll honor your warranty. :lol:

Stick with the owners manual recommendation...

not to discredit anything else that's been said

but out of these 20 NEW cars, how many have lived to 200-300k miles on the original engine?

Good point. I generally keep my cars for 70,000 miles, although had a VW bug with 105,000.

:lol:

I'm not taking any advice from a guy who's website looks like it was made using geocities.

Also, you can't logically debate -any- topic when all you have is anecdotal evidence...which is all that this debate is made up of.

I am following the owner's manual...at least for the next 7 miles!

You have two options.

a) Listen to Toyota/Subaru engineers, who designed, built, and tested this engine to it's breaking point.

b) Listen to some guys who took a few motorcycle engines apart.

Your car, your money, do whatever you want.

The reason I don't believe in rpm limited break-ins is because of ring seating. If your piston rings never seat, that engine's never going to see full power and it might just pop one day. How do you get that sealing done? Engine braking. By the book break-in procedures wouldn't really allow for that...

I've just seen too many Subarus pop a ringland; granted they were turbo applications with a shitty tune in stock form and often modified. Plenty of us will be wanting more power and subsequently adding more power; if our tunes aren't trash and our pistons aren't glass we'll be fine. What are the odds of that, though?

Finally! It only took me 33 days...achieved at 1232 Arizona local time. It's hard to get your mileage in when you only live 2 miles from work. I followed the owner's manual but at times extended the rpm's past 4K. Sometimes 45 or 5, but not much more than that.

I just bounced off the rev limiter for 3 mins straight and called it solid. Finished hooking up my nos and im good to go now. Lmfao jk guys

it's been mentioned more than a few times that engines are reved high and are put through the entire testing cycle before they leave factory.

Not to the same QC level as certain other types of engines; while some may think it has little relevance to our cars, Honda CBR motorcycles are put through a rigorous dyno test cycle at the end of assembly. More commonly you'll see that type of stuff done on high dollar cars (Pagani, Ferrari, etc.). I doubt Subaru does a full break-in and if they do, it doesn't matter if I rev the piss out of my brand new engine.