Thread: How soon do you change the oil after........

I had the whole motor pulled and machined worked the block beacuse of
broken cam bearing it had.
I installed all new bearings(Cam,main,crankshaft) and gaskets with the repair.
I guess just like a cam install or motor rebuild.
How many miles or days should i drive before changing the oil?
Wanna make sure i get all the left overs out of the engine before i go WOT.

or break it in on a dyno....mmmmmm

it should run hard right away if you put it together right. yeah, take it easy for the first 100 miles or so, but why not romp on it a little. it is good for it to wear in knowing youre going to destory it everytime you get in the drivers seat.

make sure to use standard oil instead of synthetic for break in. thats what GM says to do on my GM circle track motors anyways. as long as the cylinders dont fit to tight you should be able to go balls to the walls fairly soon. i would granny drive it for 3-5 hundred miles and change oil. if the oil looks good and has no shavings or anything i would go WFO. jmo.

I did a 30 minute "break in" by running the engine gently through the RPM-band using a good filter and conventional motor oil. Then I changed the oil and filter, ran it for several hundred miles without beating on it. Then I went back to the normal routine. That was not the GTP, but it is what I would do regardless.

How i've heard or known people to run it easy for the first 1,000 miles. Change your oil/filter the first 100, 500, 1000, 3000 miles, then go your regular cycle (which should be ever 3,000 miles anyway IMO).

In my opinion, with the money spend on a good rebuild, i'd use the procedure above. You can't be too careful and I wouldn't want any doubt I didn't let it settle in long enough. 1,000 miles is plenty...

There's a lot of schools of thought out there. One of the most popular is the exact opposite of what you're talking about, WhiteDevil, where they say you NEED to vary your engine speed during break in to properly seat the rings.

beat on it. then it will be prepared for it for the rest of its life.

i dont even really say drive it. fill it up with oil, crank it up and let the oil get hot ideling for about 10-15 mins. drain it, run a few quarts threw while draining to get everything out, repeat, drain, refill, drive a bit getting on it, just a short drive testing everything out, drain. all the times checking the oil for shavings, by the last time there should be no shavings of metal. then fill up with good sythentic oil that you know is gonna lubercate well then enjoy but thats just the method i would use.

and i would still take it kinda easy on the first oil of synthetic, cause thats just me, i would go wot but not everywhere, after that oil change, which i would change after about 700-800miles, o its on

Originally Posted by WhiteDevil

^^^ truly a waste of money, Ive always used and was taught the 20 minute/2K rule. Ive only had one engine blow up on me and that was using the 1K mile procedure, RPMS fluctuate too much during those 1K miles and the internal parts dont really make a solid pattern with these fluctuations.

Like I said...

In my opinion, with the money spent on a good rebuild, You can't be too careful and I wouldn't want any doubt I didn't let it settle in long enough.

I'd rather waste my money, and get some miles on it personally. But thats me.
Oil is cheap, thats all I can say....

oil is cheap, dont be scared to use.

Originally Posted by Iron Indian

Like I said...

In my opinion, with the money spent on a good rebuild, You can't be too careful and I wouldn't want any doubt I didn't let it settle in long enough.

I'd rather waste my money, and get some miles on it personally. But thats me.
Oil is cheap, thats all I can say....

I agree with Shawn. Hell I ran 1500 miles and changed the oil every week...which turned into about 6 oil changes I think but it ran fine and still does today. When you are on a budget or something I'd rather waste 20 bucks on dino oil and a filter than another 500 on a motor rebuild IMO...Ever think that maybe you might have done something wrong on that motor rebuild that you ran the 1K miles?

yup good point