I have an 2006 Cobalt LT. I am pretty satisfied with the power. However I have not really pushed it too hard yet. I have got about 10,000 K on it now. My friend says that after about 30,000 K the power will increase on it.

Is that true?

 

no if it does you wotn notice it. tell your friend hes and idiot and should jump off a bridge.

 

No. Unless you mod it before then.

 

well, an engine will make more power once it's well broken in... but i have no idea about 30k on it...

maybe if you use really crappy case and leave a lot of carbon deposits on the cylinder heads... it'll raise the compression...

 

yeah it sounded like BS to me as well. I just wanted to confirm.

 

Well he is 6-3, 275 lbs, so i am not going to tell him that.

 

hit him with a steel chair so hes k.o'ed and leave a sticky note on his forhead signed by a diffrent friend calling him an idiot

 

 

maybe he meant 3k miles..break in period...and got confused n said 30k miles?

 

Sign the note as his mother, because I doubt he will hurt his mom and then nobody dies.

 

Its not a bottle of wine that improves with age! Its a machine, and it slowly loses its performance over it's lifetime. With engines usually something breaks and that's it, there usually isn't any kind of noticable loss just from age. But there most certainly is no gain.

 

u might see a little gain after the car is broke in but not enough to tell...2nd fyi the rx8 has been tested to put more power down after 30k miles than it did at 1k miles...::rotary engines go figure::

 

It can depend on the car but it is common for a car to get alightly quicker after putting on some miles.

Car and Driver picks cars for a 40,000 mile 1 year test. They test the car when they get it and then at the end of the 40,000 mile test.

Most times--the cars a few tenths quicker. Ocassionaly its the same and even les the car is slower.

So you should see a tiny improvement with a few miles.

 

i dont thin it will unless u put mods on it, then it will

 

Your engine isnt FULLY broken in until about 30,000 miles. you will see your highest performance numbers between 30,000 miles and 60,000 miles. dyno it!

 

It does get faster u morons!!! Cause u get used to it hahah!!! I win!!!

 

This is a topic that no one ever seems to agree on. When I bought my motorcycle the guy at the dealership told me after my first oil change I could really beat on it, but after consulting with numerous people I was told so many different things I didn't know what to believe. The same thing happened when I bought my cobalt. The guy at the dealership told me it didn't matter and you didn't have to break in your motor. Then I got home and talked to a few people and got a s#*! load of different remarks. I'm totally baffled on this, I definatly don't think that a motor gets better with milage but then again after only owning two new vehicles how the hell should I know.

 

Oh btw I know this isn't completly on topic but on speed network they had a guy who builds dragsters saying the best way to break in a motor was to drive it right from the start how you intend to drive it. ex. if you want to race it then do so from the start, if your going to drive like grandma then do so from the start. And your motor should take care of the rest.

 

anyone time u rebuild a motor it is best for u to do a 500-1k mile breakin....no heavy foot or it can mess stuff up

 

An engine will make a little more power after a few miles. That's a fact.

And on the break-in stuff, there are two schoold of thought - baby it or beat it. Babying it keeps things slow to make sure it's all working well and wearing right. Beating it ensures a better ring seal.

When I break an engine in I do a combination...I'll drive it pretty hard with a decent amount of throttle, but I don't rev it over 3000-3500rpm for the first 1000 miles or so. This keeps things moving slow, but sllows for high cylinder pressures to get those rings seated nicely.

 

Bought my HHR with less than 100 Miles on it and started red lining all the gears day of. Oops! HAHAHAHA! Never had any probs and now I got 15000 on it and NEVER had a prob with it. Don't plan on it either! These motors are damn near bullet proof. Not like HONDA bullet proof but close! (you gotta admit, you could run an older honda engine with NO oil and damn thing woulod go for 100k miles!)

 

When I first got my balt, it would not go unless I had it to about 2500rpm, now thats its got 2000mi on it, it goes at about 2200 rpm. I have noticed the low end power increase too (1500-2000 rpm) It should perk up some right when its new but after 5000 miles or whatever thats in km, thats all you gona get.

 

going on a diet increases power...

 

AKA "the driver mod"