Just updating from my last post.
I ended up getting 15.7 mpg in the truck, which does not anything to brag about, not even worth paying the higher price per gallon imo.
I filled up with it one more time just to make sure, but I think I'd be better off spending the extra for a higher octane in the blend.
However, I did tear the XR70 carb apart again for a real good cleaning and dumped pure in it, just to see if it holds up better than the blended. I got a real good cleaning of the carb bowl using muriatic acid this go around, which took away the chalky and varnished film that resided after previous cleanings. So who knows what will happen now.
Non-Ethanol 87 or Ethanol Based 91?
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