wrote in message
ups.com...

I used 128 cubic inches per gallon. I think that may be right.

Not to be picky, but there are 231 cubic inches in a gallon. Your
engine is a four-stroke, so it will only displace it's volume in two
revolutions, so you need to divide by two. The volumetric efficiency
will depend on throttle setting, making the calculation more difficult.
It is easier to go by way of fuel burn, since the proper ratio of fuel
to air doesn't change much in a gas engine. See above for an example.

I didn't take the time to look it up. I did some really rough calculations
to find out that they are not talking about volume.

Even using your corrected figures, 320ci * 2500 * 60 / 2 / 261 = around
100,000 gallons (91,954). Way more than the 14 times the 8.5 gallons of fuel
I burn in an hour.

I remembered (apparently incorrectly) that 1 cubic inch of water was 1 oz,
and weighed 1 oz.

I vote for a matter to energy converter (safe, of course) that follows
E=MC**2.