Just recently had a rebuild of my motor. Wiseco forged pistons .020 overbore, k1 forged connecting rods, motor was balanced and blueprinted, arp L19 head bolts, Jim Wolfe block cooling mod, HR oil pump, water pump, and thermostat. Existing mods are a greddy twin turbo setup, fuel lab fuel system, full exhaust, and an OS Giken triple plate clutch.

My question is, the shop said I need to get an oil change within a few hundred miles because metal shavings and such could get in the motor. They said I can't just shock the motor and put full synthetic oil in. What do I do in this situation. And no, I can't call the shop that built it

 

why cant you call the shop? the reason they say that is the rings will never seat, if you did a soft break in i would wait till after 1k miles for synthetic.

 

So what type of oil would work best for this initial oil change?

 

i used basic no brand oil with comp cams additive for my first 2 oil changes at 20 and 50 miles then rotella 15w40 since, tryed 15w30 but saw higher oil temps

 

Awesome. Thanks for the help. I'm at about 200 miles since the rebuild so I'm planning on doing the change this weekend

 

I used Motul organic break-in oil.

 

Thanks!

 

Sounds like you got your answer - but +1 to a basic, no name oil. You sorta want a little more friction between the new components to wear on each other a little bit more than normal. If you want to go nuts they do sell 'break-in' oil that would suit your needs.

 

What weight would be best for these motors?

 

This may shed some light on your question:

https://my350z.com/forum/vq35hr/3003...-analysis.html