I'm installing a new oem short block and was wondering what oil is recommended for break-in. I've been told regular castrol 10w-30 is fine but I just wanted some opinions first. Thanks in advance

 

amsoil sales a Break in oil

 

Shell rotella 10-30 lots of zinc

 

We use Joe Gibbs oil at our shop on fresh engines. They have a specific break in oil.

 

So does Brad-Penn

 

Lol well there ya go....just no royal purple, and youlo be good. I've even used checkers standard 10-30 for a first brake in also

 

Brad Penn break-in. Amazing stuff.

 

Thats what I used too....

 

Thanks for all the replies, we fired it up tonight and heat cycled it three times (cooling system takes forever to completely bleed of air ). I've heard great things about brad penn on this board, however my mechanic told me to stay away from it and it doesn't help that it's rough on catalytic converters. Going to break in the motor tomorrow, hopefully everything goes well .

 

so what oil did u use?