Eeyore wrote in
:



Mike Noel wrote:

I'm guessing they are measuring fuel efficiency as MPG, so a denser
fuel has better numbers just like the denser diesel fuel has a built
in MPG gallon advantage because it is heavier than relatively light
gasoline.

I can see that might be their idea but the possible practical fuels
for ICEs are fairly limited in scope, at least excluding those that
don't give poorer performance (bhp) like ethanol for example.

Butanol which can indeed be made from bio-sources is closest to
gasoline in overall performance but I'm not aware of any supposed
'efficiency' advantage.

Would be interested in hearing more of substance rather than marketing
copy.

Why you running Avgas in your Austin Alegro now?


Bertie