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77stang
Senior Member Joined: May-19-2004 Location: United States Status: Offline Points: 342 |
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Posted: August-09-2006 at 9:29pm |
PCM manual calls for different oils to be used in different ambient temperatures with the preferred warm weather oil being straight 30W
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3357 |
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Exactly,
The EPA and automakers have been stripping the zinc compounds out of oil, because the epa mandates that automakers must warrantee emission equipment longer and longer. these compounds kill cat-converters. Automakers saw this comming, and have began switching their fleet to roller cams since the mid-late eighties. With the latest revision of oil spec, there have been a lot of marine and classic musclecars eating cams; lots of buzz about it lately. |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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flat tappett cams need the heavy metals for the extreme pressure exerted on the lobes and lifters,newer motors are now using roller cams and the lifters have bearings,so they dont need the additives that were needed for the flat tappet cams. another way to save the oil co. money and to clean up the enviroment.diesels still use old technology,ie Rotella oil straight 30 or 40 wt.
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Gotta: Whats the dael with no multivis? Been using it on all my boats. Am I in the wrong? Is the Diesel better for the motor? What dodes 79 think about this?
john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3357 |
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Leave your 'air filter' alone. Its a spark arrestor. Don't use multivis, just use Diesel rated (CC) straight 30 wt, is has enough zinc to keep the old cam happy.
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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CCxHYPERLITEx
Senior Member Joined: August-08-2006 Location: United States Status: Offline Points: 122 |
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20w/40or 20w/50 either should be fine because they run eight cylinder if i recall....
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-will-
My 84 nautique |
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mark
Newbie Joined: May-14-2006 Location: United States Status: Offline Points: 3 |
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i have a 1977 amer.skier with a 302.what type/wt oil should i use?just bought a hand pump to try my hand at changing it.also,the air clnr. is on the small side.is it a stock type filter? looks kinda custom.its about 8"across.thanx again for the help.the boat runs/drives great.
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