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Funny, you should see my Frankenstein 020T, a conglomeration of 3 versions of MS200's. Yet it's the oldest carb, with 3 adjustment screws that gives me that on the pipe throttle response I crave! Funny thing is, once my carb settings were set in an active cut? I haven't touched them for years...

You wouldn't believe how many greens in this industry fry their saws effin with their carbs Mag. Saws not takin to ethanol well can't be cured by twistin adjustment screws IME. Jomo

So my Harvey homeowner's saws are both going to fry cuz I dumped his ethanol adulterated mix out and filled them with my racing mix eh? Even box store Stihls seem to luv it no end IME! Jomo

That wasn't the tune you was whistlin a page ago Mag! Jomo

At 8 bucks a quart? It better perform miracles regardless of borders! I'm fairly certain it's the same stuff Mag. Jomo

I trust the chainsaw mechs at Madsen's Saw&Supply. http://www.madsens1.com/saw_fuelmix.htm And their take on E85 fuel? Nyet, and they've got pics of gum jelly plugged carbs n fried Pistons to prove it! Jomo

The fact that the folks at Stihl avoid it like the plague, by guaranteeing moto mix has no ethanol in it whatsoever, and that using moto mix exclusively'll double their saws factory warranties? Jomo

Holy Mackeral! My racing fuel costs 1/3 the cost of Stihl's moto mix at the saw shop! And here I thought I was splurgin big coin to feed me darlins! 8 bucks a quart's 32 bucks a friggin gallon... Jomo

Are you inferring any similarities between alkylate n ethanol Mag? One's great for chainsaws, the other ef's them up, IME. Jomo

Kinduva vicious circle Levi, by the time you run down an aviation or racing fuel outlet like Sunoco? http://racegas.com/fuelfinder You're payin 9 bucks a gallon, then buying the Silver bottled Stihl Ultra Synthetic mix, puttin you right back at ten bucks a gallon to stay on the pipe n revin...

Alright Mag mate, I'll bite. If ethanol's not the culprit effin with today's chainsaws? Then why's Stihl marketing moto mix guaranteed ethanol free, high octane premix that'll last a year on the shelf? http://www.stihlusa.com/products/oils--lubricants-and-fuels/premixed-fuel/motomix/ Jomo

The high octane racing fuel's attributes include an extremely long shelf life compared to ethanol laced fuels. Ideal for semi-retired blokes like me, as well as the Harvey homeowners that go months without running their chainsaw. Jomo

Well my high octane racing fuel chainsaw gas seems to be a cure all for Harvey homeowners whose box store stihl 170 something's that won't rev up n run right! Did a beetle kill stone pine removal, no haul, homeowner doing the clean up after I left with his own box store stihls. Getting nowhere...

A fascinating insight on high octane racing fuel, from the folks at Sunoco, who sell a lot of it here locally. Overheard at the local track: “High octane fuels burn slower.” “My motor doesn’t need all that octane so that fuel won’t do me any good.” “I need the highest octane so I can max out...

Yup, without lead to boost the octane, pre ignition knocking caused big problems. An F One engine has an ungodly 17:1 compression ratio and spins up to 18K RPM. Their fuel additives are closely guarded secrets these days it seems. I suspect our industry has a higher on the job fatality rate...

I'm fairly certain lead in gas acts as a lubricant in high compression motors. Jomo

I believe it is leaded Jim, not positive though. All the local racers who run extremely high compression ratio engines both 4 and 2 stroke use it exclusively in their expensive weekend play toys. Works well for me too. Jomo

I noticed many years ago that despite running premium unleaded only in my saws, my carbs'd gum up and require a thorough cleaning to get back on the pipe n run right. But about 3 years ago I switched to 100 plus octane racing fuel with extremely good results throughout my entire stable of saws...