Hello guys! I had read not to long ago,, the certain engine manufactures did not recommend using avgas?? I've been using for many years,, and I don't think i've ever hurt anything. Perhaps they are concerned about guys not richening the mixture? My technique is open both hi and lo mix screws a bit,, so it's running very rich,, and back them back in,, the run a clean 2 cycle. I know there's guys that will break-out in a cold sweat if they have to adjust the mixture,,LOL (you'd be surprised of the guys running these engines that are really afraid of them!) My reasons for using avgas is that your getting a MUCH better quality of fuel,,(today's car gas is really junk),, and you have longer term freshness with avgas,,3 years I'm told. (they say about a month with car gas,,but I'm inclined to think ever less),,not to mention the extra omff ya get,,and longer run time on a tank full! So,, my question is,, after all these years,, (IMAA # 120),, with both DA and 3W engines,, is there anybody else that uses avgas?