Some days I fill up daily, others I drive until Empty.
I haven't been running with Ethanol lately, at least not since I've been tracking it on my website. I just put the website up a couple of weeks ago.
I'm currently just doing aero mods (taping seals, etc).
After that, I'm going to do more fuel blend mods to see where the sweet spot is.
I don't want to combine modifications, because I can't quantify how much each change affects mileage.
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