| Author |
Message |
    
Scott Wilson
New member
Username: vikingtime
Post Number: 2
Registered: 05-2009
| | Posted on Friday, October 23, 2009 - 12:00 pm: | 
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Changing the oil, first year with this boat. It has 1986 twin 454 7.4L, 1600 hours, 20,000lb vessel. Long Island, NY temperatures- (get's pulled out in a few weeks).
Looking for recommendations on what oil to use (brand and weight). Tons of opinions I'm sure, hoping to get a consensus or narrow it down to a few options.
Thanks! |
makomark
Senior Member
Username: makomark
Post Number: 1747
Registered: 09-2008
| | Posted on Friday, October 23, 2009 - 03:50 pm: |
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mobil1 full synthetic, 15W-50. ~3500 hours now. |
diver dave
Advanced Member
Username: diver_dave
Post Number: 475
Registered: 08-2008
| | Posted on Friday, October 23, 2009 - 04:08 pm: |
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I'd agree with multi-viz synthetic, anyplace north of orlando. Actually, after using HD40 straight for decades, I may switch to amsoil 10w40. They have one with high zinc content. 50w kind of thick, no?? |
Ted Broderick
Advanced Member
Username: tbrodes
Post Number: 106
Registered: 02-2008
| | Posted on Friday, October 23, 2009 - 04:57 pm: |
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I use mobile delvac. High zinc.... |
Al
Advanced Member
Username: knuckle47
Post Number: 742
Registered: 09-2007
| | Posted on Friday, October 23, 2009 - 05:04 pm: |
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I just switched to 20W-50 Mobil 1 for the boat...I have 217,000+ miles on my 2001 F-150 using pure synthetic...I should not even say this BUT...( you know why) it runs as good as the day I drove it home from the showroom.
Hoping IF any residues are built up in the engine, they may get cleaned out with this next change in November |
makomark
Senior Member
Username: makomark
Post Number: 1748
Registered: 09-2008
| | Posted on Friday, October 23, 2009 - 05:37 pm: |
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170K+ on a 99 f-150 with full syn Mobil 1 since first time I changed oil. Cleaner inside the rocker boxes than when I bought it....now, if i can only fix the exhaust manifold.
Wife's minivan 183.5K - Mobil 1 |
Bob Meck
Member
Username: bob_on_this
Post Number: 43
Registered: 01-2009
| | Posted on Friday, October 23, 2009 - 05:41 pm: |
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Are all full synthetic oils high in Zinc?
(needed for flat cam followers) |
makomark
Senior Member
Username: makomark
Post Number: 1750
Registered: 09-2008
| | Posted on Friday, October 23, 2009 - 08:39 pm: |
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answer to the "all" question if definitely NO.
At what point is High and where is Low? Not trying to be a SA by any means.
Suggest you research your brand of choice and see if it meets your needs.
I think the 'need' for the older engines is more for the "break in" phase. I'm certain that there is less of the zinc compound in the current 15w-50 mobil 1 than was in the 20w-50 that was available when we first switched. I looked it up and the reduction wasn't a lot in absolute terms. Exactly how much should be in an oil for a given engine is something I'm ignorant about. I can say I've never had any cam issues and don't know anyone, personally, that has had an issue with a standard marine class engine. |
diver dave
Advanced Member
Username: diver_dave
Post Number: 476
Registered: 08-2008
| | Posted on Saturday, October 24, 2009 - 09:48 am: |
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Unfortunately, I can't find the source for this data. It came off of the internet, must be correct..
API .... P (ppm)...........Zn (ppm)
SE-SJ... 1301 ..............1280
CI-4 ... 1150 ..............1374
SL.......994................1182
CJ-4 ....819 ...............1014
SM ..... 770 ...............939
Either I use SJ or I use an additive, like ZDDP. I did have a cam wipe on my port engine a few years ago. I do see that Pennzoil marine oil is SJ rated, still.
Oh, and to continue with the off-topic section:
365k on my 535i with nothing but 20w-50 castrol dino oil. The sales guy said the engine was still very strong as they drove it into the clunker yard for engine destruction. The head/block never got any major maintenance. The on board computer said average mph of 33, so that = > 11,000 hours. |
Scott Wilson
New member
Username: vikingtime
Post Number: 3
Registered: 05-2009
| | Posted on Saturday, October 24, 2009 - 12:09 pm: |
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Thanks for the info! |
