What weight oil to run ?
#21
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Simply the best off the shelf oil for boats IMO. We should all be using an "offroad" oil unless your boat has cats.
Advance runs Valvoline conventional oil specials twice a quarter at 3.49 a quart. In the ads they don't show the racing oil, but it scans and rings up at the discounted rate.
Advance runs Valvoline conventional oil specials twice a quarter at 3.49 a quart. In the ads they don't show the racing oil, but it scans and rings up at the discounted rate.
#22
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I personally like Redline synthetic engine oil, and NEO for anything with gears. It's my preference. There are other oils just as good. Modern PCMO'S (conventional) are outstanding lubricants in 2013, and perform very well even against synthetics that contain PAO basestocks. People just won't accept that....
In boats you want a very shear stable lubricant. If you get there by using a Polyol ester or a group III refined product really doesn't matter. Proper weight and shear stability is what counts for a boat. Pretty much all available oils will have enough zinc for even flat tappet engines. Obviously some oils excel in shear stability but remember boats tend to dilute the oil with fuel. This is where UOA's come in to establish baseline.
Last edited by Borgie; 09-12-2013 at 10:46 AM.
#23
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So I take it that no one has heard that in some cases you would have to run a light oil because of the lifters? I thought it was strange when I was told this.
#24
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Scroll up and answer the questions from rmbuilder and mild thunder asked, these guys are respected builders and can't help you without that info.
Oil is not your problem, you have mechanical issues that are only going to get worse over time.
#29
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It will pump up quicker with a 5W vs a 20W when cold, once warm a 5W40 is the same as a 20W40 at 210 F. It would make no difference once hot.
But once the lifter is pumped up, it is pumped up. I have never had oil drain from a hyd lifter regardless of oil viscosity.
Ken
But once the lifter is pumped up, it is pumped up. I have never had oil drain from a hyd lifter regardless of oil viscosity.
Ken