Oil for F70 in San Diego

[chartscharts]

Reading my nifty owner's manual for my Yamaha F70, it says to use the oil best suited for the temperatures in my area, and it gives me a nifty chart to look at.

That chart seems to say that 10W40 covers temps from about -15 to about 105F.

Whereas 10W-30 covers about -15 to about 95.

Since I'm in San Diego, (and live in east county), temps above 95 aren't out of the question.

So 10W40 seems superior to me. Covers more temperature ranges, including some at the high end that I might experience.

YET, all the oil change kits for the F70 come with 10W30. Even on Yamaha's site. And the only kits with 10W-40 are for PWCs.

Am I missing something?

[DennisG01]

So... don't buy it as a "kit". Or is that too simple of a solution? Buy the oil and filter separately.

[chartscharts]

Heh, I like the way you think. Yeah, of course I've thought of that. But since there wasn't a kit, I am wondering if there was some thinking or guidance or recommendation that 10W-30 was actually the preferred one from Yamaha's perspective. Or something else I was missing.

[DennisG01]

Heh, I like the way you think. Yeah, of course I've thought of that. But since there wasn't a kit, I am wondering if there was some thinking or guidance or recommendation that 10W-30 was actually the preferred one from Yamaha's perspective. Or something else I was missing.

Nah, I don't think you're missing anything. You should be just fine with the 30wt, but the 40wt gives you a little extra assurance. You did your proper research - make your decision based on what the published Yamaha charts say - not by the availability of some kit.

[Skin diver]

I use 20w-40 for my twin f70's. Its a little harder to find but its out there.