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I'll second the gas in South Dakota, Wyoming, and Colorado. We made the loop home from Sturgis down to Denver and back to Kansas City. One of the guys running a '90 evo had to dump his tank at one point. It was the worst gas I've ever seen until we got back into Kansas. Mine ran ok but got about 30-35 mpg at the worst point. Really makes you wonder.
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2008 FXSTC dark blue pearl
V&H straight shot slip ons
Big Sucker
PCIII
Yeah it sucks, when ever I go out of the metro and find real gas my 08 runs like a top on it. when I'm in the metro mess I regularly run some RXP in every other fill up and it compensates nicely, if you haven't tried it give it a shot, its not an octane boost it just makes sure most of whats in your tank burns and isn't wasted. I don't know about other parts of the country but here its used a good deal. I swear by it with the reformulated pond scum they call gas nowadays
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2008 Harley-Davidson FXDF Dyna Fat Bob
Thunderheader Big Sucker A/C
PCIII USB Custom advanced map from fuel moto
Barnett Heavy Duty clutch spring
Anarchy is only truly fun for the rational anarchist
With gas being so high, nobody is buying high tess gas. Its laying in the tanks and going bad. I ran it in everything, Now the king is the only vehicle that gets the good stuff. 1 ounce of sea foam per gallon in the tank seems to help.
Funny thing is... cool air has more density than hot air. I used to get much better fuel mileage in the winter.
Now that there's stupid ethanol etc in gas here in the winter months (Oct-Mar) I actually only get about 40mpg versus the 50+ I used to get. I don't hot dog or twist my throttle at intersections while bored at redlights...
Audi states the need for premium, yet my A4 runs perfectly on regular (3.2L engine). Porsche states the same thing regarding octane levels, but my Porsche runs like trash on anything less than 93 octane, and more than 10% Ethanol is a big no-no that will supposedly cause major ignition and emission problems- so I buy BP 93 for the Porsche and my FLSTF- so I am helping sales of high octane gas.
All my vehicles run better in cooler temperatures as well.
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2010 Fat Boy with Chrome Wheels, Vance & Hines Big Shots Staggered, Zipper's Max Flow air cleaner with chrome backing plate, TTS Master Tune, and more chrome than my wife wanted me to spend money on
A couple points:
1) Ethanol is an octane booster.
2) Ethanol stoich is about 9:1 - Gasoline is 14.7:1
So, while ethanol is a good octane booster it still takes more to get the engine to run good as applied to even with as little as a 10% blend.
IME, These V-twins seem to run fine @ 14.0-14.5:1 on gasoline
and run fine @ 13.5-13.8:1 on 10% blend.
My advice is to get your bike tuned for 14.0:1 in light load/low TP and 13.2-13.5:1 for heavy load/high TP. If necessary you can increase fuel delivery more if needed.
Hoping this helps,
Bob
