Which Oil to use on a freshly rebuilt motor?

[2.SlowES]

Awesome, thanks guys! And sorry for impeding on your thread...

[eclipse_spyder]

Awesome, thanks guys! And sorry for impeding on your thread...

It's a good thing you brought that up cause I didn't know that either.

[Dsmboy1991]

There are quite a few different theories on break in. However I agree with Jet with the frequent oil change method. The luck I had with mine was using a heavier weight 20w 50. I changed, after first day of running, 500, 1000, 1500, then switched to 10w 30 synthetic and regular routine. Like I said though, alot of different theories are out there, ha ha.

[badinblack]

For brand on break in, I have always used rotela 10w30. The properties in it are great for break in. I am suprised no one else has mentioned it yet here.

[Shane@DBPerformance]

I think Hughes was the Rotella master.

[Goat Blower]

Hmmm, I always use straight 30 weight non-detergent for initial break-in. About 20 miles doing some coast downs to seal the rings, then change the oil and put in my usual stuff, now Valvoline Racing 20w-50 and change at 100 miles and then 500 miles.