nemesis.442

So I just rebuilt my d16z6 and I was wanting to know if there is a certain oil I should use for the break in period. Or is full synthetic good enough. My machine shop is trying to get me to use his $25 a quart crap. Any ideas.

EsotericImage

iTrader: (8)

Oil changing schedule:
Startup - 30w non detergent, change after warm up
after 20 miles - your favorite non-syn
after 100 miles - your favorite non-syn
after 500 miles - your favorite non-syn
after 1000 miles - your favorite non-syn/synthetic (it is now safe to run synthetic)

You should stop seeing metal shavings in the oil after the 100 mile oil change. I strongly recommend using a magnetic oil drain plug for freshly built motors. You don't want all those shavings being pumped to the bearings, cams, or splashing on the cylinder walls...bad. Don't worry though, they will be there, no matter how close the clearances are.

Now for the break in. Try to vary the revs as much as possible, with alot of short blasts. It is very important that you let the engine "brake" itself by just letting off the throttle and letting the vehicle slow down on it's own, while in gear. This creates a vaccum in the cylinder and forces the rings outward, which wears down the peaks in the cylinder's fresh hone. Do this for the first 20 miles, and then proceed to beat the **** out of the motor, up to it's maximum rev range, as long as it is tuned accordingly. As long as the bearings are within spec and the rod bolts were torqued correctly, there is NOTHING to worry about.

I guarantee you WILL NOT burn oil using this break in method. If you do, you probably have leaky valve seals or bad rings/cylinder hone, or maybe possibly even other major problems with alignment of the sleeves themselves.

speedjunkie_g35

^^^ This looks like a good method to follow. Synthetic is to thin to put in a fresh build at first and wont allow the gaskets to seat properly. I changed after start up, at 100 miles, 250 miles, 750 miles, then waited until I put 2500 miles on the motor before switching to synthetic. I did make sure to look for any metal shavings. If I would of found any on my drain plug(magnetic), I would of changed at shorter intervals.

FYI: This was for my f22 in my work car so it never saw the redline

nemesis.442

So what are you meaning by beat the **** out of my engine.

speedjunkie_g35

Drive how you would normally drive and don't be afraid to hurt it

nemesis.442

Sounds good to me. Thanks for the info guys.