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I am the engine builder. I'm doing it myself. Break in oil has high zinc content.

Hey guys. I am currently building an LS and trying to decide what oil to run. 1200hp on a turbo pushing up to 30 psi. I will be running larger than stock clearances. .0025 on rods and mains with #5 main at .00275. I have a high pressure pump I was planning to run but had someone today try to...

Originally Posted By: Kuato Originally Posted By: Mccull No VVT and DOD on this engine anymore. It all has been deleted. I am not sure on the clearances either. When I voiced my concern about the 20w50 is when they said use Joe Gibbs so it seems they are ok with Mr using a lower viscosity. The...

No VVT and DOD on this engine anymore. It all has been deleted. I am not sure on the clearances either. When I voiced my concern about the 20w50 is when they said use Joe Gibbs so it seems they are ok with Mr using a lower viscosity. The 20w50 recommendation came from a general break in...

They weren't specific. Just said Joe Gibbs break in oil. I'm not going to ask because it allows me a bit of freedom that they weren't specific.

I know it's been a while. I've been busy. Finally got the builder to tell me to use Joe gibbs break in oil. Any recommendations on which one?

Wow. I never expected to get so much input. I can tell this forum is differentirely than most. Lots of knowledge and maturity here which is rare in a forum. It is a roller cam. Should be close to stock clearances. Bottom end is all stock. No danger. My wife actually only drives with a lead...

Hello. New guy here. Been looking around and I saw on one of stickies here that it seemed to be best to just put out there what I have and the help will come? I'll give it a shot. Any and all input is greatly appreciated. I want to do this right. I have a 2008 silverado 5.3 4x4 I have a brand...