What octane for 03 yami....90hp

[lilwily]

I normally have been using 87.....can't remember what the manual says.<br /><br />Thanks.........Wily

 

[JB]

Re: What octane for 03 yami....90hp

Unleaded regular is fine, Wily.<br /><br />Most manuals say "87 octane or higher" and a few, mostly 4 stroke manuals, suggest higher octane.<br /><br />I run 92 and 93 octane in my 4 strokes so that I can use leftover gas in my vehicle, which requires 91 or better.<br /><br />I see no benefit in using higher octane than 87 in engines that don't require it.