hey guys.. so i got my 07 sport a week and a half ago now.. im at 400 miles and I wanted to get your opinions on how to break in the engine the right way..

Some people say to take it slow and treat it right (wait until 1000m to open it up) and some people say that if you treat it like a bitch its gonna drive like it later on.. they say to alternate the RPMs right from the start, flooring it on and off, so it opens up like a beast..


whats your guys' input (considering engine maintenance and performace later on).. any suggstions/experiences?

all comments appreciated.. thanks!

 

hey i just got my 07 g35s sedan 6mt about 3 weeks ago , i have 1700 miles (went back home for winter break). i broke my in on the florida turnpike for about 500 miles! it seemed so much smoother after, i broke it in hard as well , alternating gears and rps and pushing my car nicely. i think breaking it in hard is the best way.

Im no expert but im heard that pistons will shave the shaft or w.e until 1000 miles where they finaly have a perfect fit, this is what ive heard im not sure but it sounds accurate...

hope this helped you, good luckk

 

For the first 1200 miles, you're suppossed to vary the speed, don't go over 4000 rpm, no quick starts, no hard braking. This is mentioned in the G35's manual.

 

No redlining, no WOT. Vary the RPM's constantly, do not let them stay at any particular RPM for longer than a few seconds. Keep it under 5k until 500 miles, then at 500 miles, start going up 1k RPM's every hundred miles occasionally. Around 800 miles go to redline in a couple of gears occasionally. Baby it until you hit 1000 miles then change the oil and drive it like you stole it.

 

Not saying you're wrong, because there are a LOT of different opinions on break-in. But don't think varying the rpms every few seconds is a requirement.

And the other argument (vs. babying) is that in the first few hundred miles the rings and the cylinder walls polish up and create the best possible compression - IF you're giving the engine enough gas to expand the rings hard. This is the argument that says you should take it past 4k and close to redline several times early and throughout break-in.

Which one is really best? Dunno, I kinda did in-between in my cars (3.5 Maxima and G), mostly keeping it below 4k but fairly heavy throttle and winding it out past that from time-to-time. The Max ran like a watch (and is fast ) and the G feels good at 1.7k miles.

 

agreed. this is not needed.

 

LoLoLOL. TThat is the WORST thing to do.

1) If babying theory is correct, you decide to bring it to high revs when the engine is most vunerable because there are shavings in the oil and you want to rev it high.

2) If the hard method is correct then you are getting the worst possible seal by revving it gently.


LoLoLOLOL


Anyway this just proves that cars today break in fine almost regardless of what you do.

 

I think this method would pretty much make sense other than varying the rpms every few seconds. That's not practical or possible in most driving situations nor would it have any real benefit to the engine.

Normal city driving would vary the rpms plenty with starting, stopping, cruising. On the highway changing speed by 10-15 mph or changing one gear every 5-10 minutes would be more than enough variation for a good break in.

 

At 400 miles, I think you're past break-in. Enjoy!

 

I don't think it's a problem with cars today. The G I test drove had 25 miles on it when I floored it. I waited until 100 with mine

 

One break-in tip that I got from a mechanic some time ago was to accelerate smoothly to 60+mph (gear for around 4000 rpm) and take my foot off the gas pedal to allow for engine breaking and allow the car to decellerate. This well create a vacuum in the cylinders and help seat the piston rings. Anyhow, FWIW.

 

Just stick with the break in method from the manual.

 

speaking of breaking in , i dnt think my clutch is broken in?! why is it so damnnn hard?

 

According to Infiniti, the break-in period is 1200 miles, or 2000 KMs.

 

I agree Deane, that's exactly the way I broke mine in. Took a whole 3 weeks to get Infiniti's reccommended break-in miles on our car. Now the real fun has begun .