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Best oil for 351w flat tappet

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Jonny Quest View Drop Down
Grand Poobah
Grand Poobah
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Joined: August-20-2013
Location: Utah--via Texas
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    Posted: February-24-2026 at 8:41pm
High ZDDP oils include:

Mobil 1 20W-50
Valvoline VR-1 20W-50
Royal Purple HPS 20W-50
Lucas 20W-50 Hot Rod / Classic car oil
Driven GP-1 20W-50

I have been using the K&N Marine HM-3001 or the HP-3001

Current
2003 Ski Nautique 206 Limited

Previous
2001 Ski Nautique Open Bow
1994 Ski Nautique Open Bow

Aqua skiing, ergo sum
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