I saw this thread and knew it was gonna be probably controversial or diverse at least.
I'll tell you what I know about two stroke oils and the ratios
.
1/Many,
many, moons ago American Dirt Bike ran an article on oils and they scientifically measured performance as it relates to racing two strokes. It is too long ago to remember or act on the specific conclusions but the general points would hold true. There are big differences in the engineering quality of oils, shear strength, wear prevention etc. (but be guided by price). Oil ratios weren't critical until into the extremes of the range, high and low, are reached. Too much oil can
cause seizures
because oil burn hotter than petrol (their conclusion not mine - could also be caused by varying the ‘effective’ jetting ratios).
2/ A friend, who was a motorcycle mechanic and an old two stroke racer, went racing 100cc Clubman go-karts. To gain competiveness he had a specialist rebuild and ‘blueprint’ his motor (and yes, I was surprised too). Part of the blueprinting was his particular motor was put on a dyno and the oil ratio was varied until they got the best HP, a 2 HP gain. And that’s what he ran.
My conclusions. Oil ratios are like jetting, you can muck with them and get advantage but you better know what you are doing. And you better be prepared to be pedantic, thorough, constantly making adjustments, be prepared to get it wrong and suffer all the consequences e.g. $$$$$’s.
Me. I run 24:1 on any quality oil, conservative jetting and concentrate on fitness, suspension, good riding, good lines, pacing myself, controlled aggression and having fun.
