bunkerbuster

I'm not 100% certain what determines the oil weight that needs to be ran in a motor. If I had to guess, the main bearings would be the biggest determining factor.

Having said that, what do you guys think?
LS3
Main bearing clearance: .003
Rings gapped for NA.
LS3 btr stage 4 NA cam
New cam bearings
Block and heads are stock, but freshened up.

My thinking would be around 10w30 or 10w40, but I'm open to advice.


Thanks,
​​​​​​B

KCS

iTrader: (20)

bunkerbuster

Ah, unfortunately I don't remember for certain. If I recall correctly, it said melling on it when I had it apart long ago. The motor was originally built for boost/nos, but I went through and rebuilt it since it looked like the last guy put the motor together in sandstorm.

I usually like to run royal purple synth after break-in. Currently, I am breaking the motor in with Brad Penn 30w break-in oil.

KW Baraka

iTrader: (7)

Did you try asking the engine builder?

KW

wannafbody

iTrader: (2)

Can't go wrong with Amsoil Z Rod 10w30. It has higher zinc for the more aggressive cam.