Jerry Wass wrote:

Hey There BYB---gotta poligize--Your anus is of the darker hue---Dug me
out some Avgas & weighed 250 cc's of it----179 gms---then weighed some
Mogas--168.3gm ----6.3% HEAVIER!!---(gettin closer to summer here in
OK,must be puttin more asphalt in it.)---Jerry
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Jerry,
Your ORIGINAL ARGUEMENT WAS....

"Hate to disagree. but there are more BYU's in a GALLON of Avgas than
in a GALLON of Mogas. Why?? Avgas weighs more per Gallon..."

Weight of fuel is irrelevant when it comes to btu/gal....
assuming your BYU reference was meant to be btu.
Btu/gal is a VOLUME measurement, not one of weight.

Thank you for your time and patience.

- Barnyard BOb -