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Old July 15th, 2012, 11:40 AM   #7
fsumotorhead
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I've heard the Rotella may no longer be a good choice, since the '07 EPA emissions on diesel trucks, they removed some additives that were causing ash accumulation issues in DPFs.

Redline makes a high zinc oil that i do know of.

I haven't built an engine in a long time, especially with flat tappets, so take my opinion for what it's worth.
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