4 Stroke Engine Oil ???

My ’04 Yamaha F115 owner’s manual calls for a grocery list of api ratings that I can’t match up. Store clerks even at the area auto store knew nothing, and I couldn’t find the answers on line… There isn’t a good marine dealer close.

Manual specs out API: SE, SF, SG, SH, SJ 10W-30 or 40.

Is it really necessary to use a marine oil? Are some of these specs overlapping?

I saw on-line, a Quicksilver oil with a rating of FC-W, does that in some way cover all the specs? Couldn’t find it in 10-40, even on line… Is 10W-30 enough, I was hoping for 10W-40?

I always use AMS marine. Meets and exceeds all manufactures specs.

What is AMS Marine? Sorry… don’t know.

Lastly, Even that Quicksilver line, their website pushes a 25W40 Synthetic blend. Seems heavy, but?

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What is AMS Marine? Sorry… don’t know.

Lastly, Even that Quicksilver line, their website pushes a 25W40 Synthetic blend. Seems heavy, but?

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I think he talking about Amsoil marine oil

Don’t over think this. Just get 10-30 Mobile 1 and your fine. That’s what I am running in my 2008 F250, 2012 9.9, and every thing else I own.

In a 10w 40 oil the Amsoil 10w 40 marine is top notch. It has the anti corrosion additive package that is beneficial in marine environments. I personally use the Mercury 25w 40 synthetic blend in all my mercs. As a side note, Mercury recently streamlined their 4 stroke oils and also was told the mercury and quick silver are identical, just different package (and price).

Yes AMS Oil

’02 Yammi F115. I’ve ran Rotella 15-40 since it’s been new. It calls for a touch over a gallon. I only put in a gallon and it’s good to go. I chose Rotella because the ratings are acceptable with Yamaha’s ratings and it’s what I ran in all my engines, both gas and diesel.jerr

Amsoil 10-30 Marine 4 stroke in my last 3 Yammies with no problems. Use Amsoil Marine lower unit lube also.

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My ’04 Yamaha F115 owner’s manual calls for a grocery list of api ratings that I can’t match up. Store clerks even at the area auto store knew nothing, and I couldn’t find the answers on line… There isn’t a good marine dealer close.

Manual specs out API: SE, SF, SG, SH, SJ 10W-30 or 40.

Is it really necessary to use a marine oil? Are some of these specs overlapping?

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The API specs are overlapping, but you’ll rarely encounter the earlier spec oils. You can use any of the listed specs, but most you won’t see on the shelves. The S prefix indicates for gasoline engines. The current highest rating is SM and you’ll for all gasoline engines producd since 2004. SJ is also still common.

I think it would be very difficult to go wrong with a high quality synthetic. Mobil synthetics were protecting highly stressed aviation engines long before anyone ever thought of putting synthetic in cars.

I’ve run Mobil 1 in cars and small engines since the 1980s and I’ve never had anything even remotely related to oil-related problems.

Personally, I’d go 10W-40. Mobil 1 flows freely in temps far below where you’d use an outboard. I believe 10-40 Mobil 1 will still flow freely at -20, so there’s no reason not to take advantage of the added protection of the higher vescosity.

Grouse

This is a great question and we get it a lot from customers at SBC. The most important thing here is that you need to run an FC-W rated oil in your outboard. One of the biggest difference between standard motor oil and outboard oil is that standard oil is formulated to run at a much higher temperature in order to keep it from building moisture. So when it is ran at a cooler temp “in an outboard” it tends to build moisture and cause more sludge and can in some cases cause engine damage.

Quicksilver oil is the same oil as mercury oil it’s just a different bottle and often available at more retailers. If your primarily running your boat here in the north I would recommend 10w-30 or 5w-30 because we don’t see that many days of extreme heat in a year.

Here is a link for some more in-depth info about the oil ratings.
http://www.nmma.org/certification/certification/oil/fc-w.aspx

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Amsoil 10-30 Marine 4 stroke with no problems. Use Amsoil Marine lower unit lube also.

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only way 2 go

Thanks all…. appreciate it!

Hold on there cycle guy, you’re not getting out of here that easy. We need to beat this horse some more. Your handle indicates you have motorcycles possibly, what oil do you run in those, is it motorcycle specific oil? I wish Spectro would come out with a marine grade of lubricants.