Break-in oil - recommendations

[Cliff Beer]

What's a good break-in motor oil for a new Ford crate motor?

Synthetic? Old skool non-synthetic? Recommended weight?

Thanks

 

[Randy V]

If it is a roller cam engineI would just use Mobil1 5w30.
Flat tappet cam, I would use 30w Joe Gibbs...

 

[Phillip]

GM has an excellent break-in additive you can pick up at the dealer for newly rebuilt engines.

 

[Randy V]

GM has an excellent break-in additive you can pick up at the dealer for newly rebuilt engines.

You’re probably talking about GM-EOS.... I’ve not seen it in quite a while but it may still be available... As I recall it was a Moly-Zinc based product..

 

[Phillip]

Chevrolet Performance E.O.S. Additive 88862587 - Free Shipping on Orders Over $99 at Summit Racing

 

[Randy V]

Wow... $27 a pint is a bit more than the $6 I used to pay at the Chevy dealer....

 

[JP Verweij]

What engine are we talking about ???

For sure a proper fresh build crate engine comes with break in oil recomendations. That has to do with warranty.

Lingo is ZDDP and you want loads of it ( 1600ppm minimum )

After the first 300mile break in, oil + filter change to same spec.
After the second 300 mile break in, oil change + filter to engine spec.

Cam Shield is a good ZDDP suplement.

 

[Cliff Beer]

Thank you gents, very helpful information.