Time for first 408 engine startup!

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Oct 13, 2012 | 07:09 PM

USMC5811

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From: MCB Quantico, VA

Time for first 408 engine startup!

Finishing up the final touches on the 408 install. What oil is a good choice to run for the breaking in period? GM HTP Magazine said to run a conventional oil to help the piston rings seat to the walls better and then switch over to synthetic. Any other suggestions/tips before the first startup?!

Oct 13, 2012 | 09:30 PM

sasquatch

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From: breaux bridge,louisiana

I'm using Joe Gibbs break in oil for my 408 that I got from TSP. Then I'm using Valvoline VR1 10W30

Oct 13, 2012 | 09:54 PM

Gray86hatch

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From: Battle Creek Mi

gibbs break in

Oct 13, 2012 | 09:56 PM

Sales1@Texas-speed

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Agreed, we include Joe Gibbs break in oil with every engine we build. Works very well.

Oct 23, 2012 | 03:15 AM

Canada

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From: St.Louis

Aaron would you stick with dino oil or at what point would you switch to synthetic?

Oct 23, 2012 | 09:06 AM

Sales2@Texas-speed

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From: Texas!

Unless you run the Joe Gibbs synthetic oil, we'd recommend sticking with non-synthetic for about 5K miles.

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