Best break in additive

Gigemags05

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6:42p, 3/21/19

AG

I'm about to start up an engine that I just rebuilt.

What is the best break in additive to use for initial start up?

classicdoug

Joined: Jul 15, 2009

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7:54p, 3/21/19

AG

I use Amsoil break in oil in every rebuilt engine we install.

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Silvy

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8:05p, 3/21/19

AG

What kind of engine?

Gigemags05

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8:10p, 3/21/19

AG

351w

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80085

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9:17p, 3/21/19

AG

Roller cam? Whatever oil youll normally run

Flat tappet cam? Joe gibbs racing oil or rotella 15w40 with a zddp additive

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TxSquarebody

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9:29p, 3/21/19

ZDDP...lots of it...redline oil has it already in there