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03-15-2004, 08:36 PM

#21

Active Mike

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Why do people run multi grade oil in boat applications???

03-15-2004, 11:14 PM

#22

Ric232

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Biggest reason is probably that many of us run synthetics. To my knowledge, only Royal Purple offers a straight-weight DETERGENT synthetic oil. (Redline has a non-detergent straight-weight that is strictly for racing.)

03-16-2004, 06:30 AM

#23

Steel Outlawed

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Mobil 1 15w-50 Whipple Charged 502

Merc HP Drive Oil

03-16-2004, 09:04 AM

#24

Pure Energy

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Mobil 1 15-50 procharged 502s

Merc lube in the drives. Drained the lube this winter and found oil to be clean, except for powdery residue, and the same on the magnets. I will stick with Merc stuff.

03-16-2004, 12:30 PM

#25

97BossHammer

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I have Valvoline racing 40 in it now.

Come this weekend I'll be putting Mobile 1 15w-50 synthetic. Debated this for a long time but after reading on here about the results w/synthetics, decided to go with it.

Merc HP lube in the drives as well.