I usually buy gas at Chevron with the Techron 3 additive or Costco which also adds a cleaning agent similar to what Chevron uses and I most definetly do use fuel stabilier over the winter which includes adding it to the gas and running the engine to ensure the fuel stabilizer is ran into the fuel lines. Never had a problem with any of my vehicles or small gas engines which last year totaled 15 different gas engines, I am working on reducing that number.
As for the mileage check, the only way any of you can truly test your mileage is to drive the same route with the ethanol free gas as you do with the ethanol added gas on the same route. It's hardly accurate to say while driving in a different state you used ethanol free gas. I have tested it on the same stretch of roadway in my truck, car and motorcycle and it just does not make much, if any difference on the MPG.
I have seen many gummed up carbs from small engines which mainly come from any type of fuel stored for too long without the use of fuel stabilizers.
2006 R1200RT (Red)
I've been carefully monitoring MPG on my R1200RT since 2008. Exact same riding patterns and road to and from work mileage goes from 49mpg with ethanol to 52 without. I carefully establish a variable free or as much of a variable free equation as possible. I've been able to track MPG so carefully now that I can tell when a gas station claiming ethanol free sells me ethanol the difference is that dramatic. I only run 93 octane in the bike. I have noticed that the difference in MPG on the BMW 328i is not as noticeable but still there. My opinion ethanol is a corn lobby solution that benifits everyone but the consumer. Free market society is not a free market when all the choices but one are removed.
"Be like water making its way through cracks. Do not be assertive, but adjust to the object, and you shall find a way around or through it. If nothing within you stays rigid, outward things will disclose themselves." Bruce Lee
2005 R1200RT 2001 F650GS
You are speaking in past tense about your Lawnboy, which makes me believe this all happened before we had ethanol in gas.
You didn't answer my question though. How does running all the fuel out of the mower before storing it for the winter damage anything? I agree, the fuel will go sour over time unless it's treated but I don't see how storing it dry for one season poses any problems?
Again, just wondering?
There has to be an additive to achieve correct anti-knock properties, i.e. octane. You're simply not going to get to premium-level octane without one.
Ethanol is a good one.
Be curious what is used in so-called ethanol-free gasoline these days.
'12 R1200RT, '02 R1100S, '84 R80G/S
Ethanol free for small engines-
This is the ready to go versions for small, in this case, 2-stroke engines. http://www.vp-sef.com/index.php/products/pro-max
The local Fire Departments have gone to this as it has a much better shelf life without the harmful effects of ethanol.
I'm mixing my own out of their Racing Fuel Catalog. Higher octane and no ethanol are a couple of key ingredients to making engines I have happy- especially after a winter of much less use.
"Well they say.. time loves a hero but only time will tell.. If he's real, he's a legend from heaven If he ain't he was sent here from hell" Lowell George
2009 F800GS 1994 TW200