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500 EFI Oil Questions

Old 04-12-2008, 10:28 PM
JB Marshall
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I have stayed with Merc 20/50 oil & filters. Don't know if I would get better performance if I switched after 250 hrs.

Anyone have any input on that???
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Old 04-13-2008, 01:15 AM
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Mobil 1 15w50
Napa Wix Racing Filter 51061R (Best filter on the market.)
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Old 04-13-2008, 07:46 AM
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royal purple in everything, merc. filters
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Old 04-13-2008, 08:54 AM
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Originally Posted by Sydwayz View Post
Mobil 1 15w50
Napa Wix Racing Filter 51061R (Best filter on the market.)
this is what I run as well.
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Old 04-13-2008, 01:38 PM
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We use Merc 20w/50 oil and Merc filters change every 20 hrs or so, so far 280 hrs and no problems
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Old 04-14-2008, 02:53 PM
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I used mobil one, no complaints at all. I switched to Royal Purple. I know people in racing who say they are showing slighty better numbers on the dyno. I like the Wix filters, they make a anti- drain back filter that if you are quick enough does not dump alot of the oil all over things when you remove it.
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