Most fuels have ethanol in them now. In the UK most are 5% .
I only use the higher octane 97-99 almost all of the time anyway. The last time I put E10 fuel in my TL in Germany it ran like a dog. Cutting out at every junction and stumbling so bad I thought something serious was wrong with it. Next fill up on supreme fuel and it was back to normal again. It really is shit fuel.
The bad news is even the "good" stuff is now mostly E5 so finding gas without booze in it is nigh-on impossible. That said, I'm using Shell V-power with good results in all my machines (Tiller and a fleet of ancient BMW V8s). You really can see the difference between that and cheap Tesco regular. Shame it's so f'in expensive.
Sunoco Supreme is a high octane leaded fuel designed for Motorsport use. It can be used as a stand alone fuel or it can be blended with unleaded fuel to add lead content and boost octane. This method works far better than using an octane booster additive.Suitable for race engines with...
You know I actually ran across this issue awhile back as well. Had to fill the tank up with the cheap stuff due to money issues and the bike ran like absolute dog shit. Sputtering. Lack of power. Didn't subside until I ran a tank full of premium through it.
And here's another interesting tidbit... I fix neighborhood lawnmowers, weed eaters, power washers, etc. for free (it's a hobby). Probably fixed over a dozen so far. Every single one was due to cheap fuel turning to gel and gunking up the carb jets. I cleaned out one the other day and tried reusing the fuel it had in it, but wouldn't start. Replaced the fuel (which was yellow as mustard) with some 3 month old premium fuel from the bike... started right up.
Point being, always use premium gas in everything. Especially if it sits for long periods.
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