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Finally Got a Superliner


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Thanks for the welcome from everyone. Glad to be on the forum.

Question: This has probably been duked out a million times here and every other truck forum: Is it okay to run synthetic oil in these old E6’s?

Also, what about synthetics in the drivetrain? 

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25 minutes ago, kansasflyer said:

I believe it is. Previous owner had it up to 78. That’s plenty fast for me.

Yeah i once had a DM dump with a 285 that would turn 2300 RPM'S, with the 1070 12 spd, and 4.17 rears, it would bury the 80 MPH speedometer.   terry:MackLogo:

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