i was thinking about this the other day, would concentrate upper cylinder engine cleaner fluid work?? its fairly thick and i guess as is gets used it would clean your engine?? i used the stuff the other day for the first time and i love it i use it for every thing now just that moreys stuff i think i got it from supershitauto. just a thought

I'm using 15w fork oil. I was using 75w gear oil. lol

Just in case its not been made clear, the weight of the SU oil is not a "set and forget" item, it's an element of your overall tune. It primarily affects the rate of enrichment under acceleration, and works in conjunction with the dashpot springs. Some experimentation can pay peformance divideneds.

I always used leftover engine oil whenever I did an oil change to top up my GX Hitachi's.

When the engine was stone motherless cold in the dead of winter the extra enrichment was just what the doctor ordered, but when the engine was at op-temp the oil had thinned enough to allow great performance.

Besides, I was lazy & a cheapskate.