I get way over 350 'miles' per tank in my Jeep CJ7 running at 70-75 mph
with gas. On the highway I start looking for the next station then and
usually have 10+ liters left on a 76 liter tank. I have it manually
tuned with a hot timing advance, hot spark and run 91 octane with only a
short 'hard load' ping before a downshift.
It is a 4.2L or 258 ci straight six with a carb and I get 11 L/100 Km or
19 US mpg or 23 Imperial mpg (old Canadian use).
I am 'out' of gas at 250 miles on an ethanol mix, and straight ethanol
does me less than 200 miles before it runs out. Only 'had' to use
straight once and was out at 190 miles. It rattled or pinged like a
bugger and I couldn't go over 65 mph on a straight.
I have no gas gauge, so I judge my next fill on the miles I have gone
and it was a real **** off the first time I used a mix to run out of gas
more than 100 miles short on the tank.... way out in the middle of
nowhere!
It is crap in my book. Just a political thing to make folks feel better
about that 'fake' gas shortage back in the 70's. Hey, use our grain to
make fuel and help farmers, forget foreign oil supplies....
I have 2 AMC Jeeps and 'both' owners manuals specifically say 'not' to
use it! They say in an emergency, only put in enough to get to the next
gas station with real gas, no matter how many 'drying agents' are in it
to try and keep the water out.
Corrosion is an issue and they also state 'performance may degrade'.
Ahh yup.
It is hydroscopic, I think is the right term, not sure, but it can hold
a whole mess of water in it and still burn in the engine, new engines
have knock sensors, mine doesn't, but did stock.
Had to use a mix in our Cherokee 4.0 FI engine and it ran ok, a bit low
on power maybe, but it has a knock sensor and a computer. Its mileage
dropped to 19 US mpg from 24-26. Have had to use the same station on
both vehicles way out in the country a few times so have had more than
one opportunity to have the 'pleasure' of using it....
Just my $0.02 for you.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Matt Driggott wrote:
>
> Just wondering how ethanol is compared to unleaded in terms of fuel
> efficiency,
> Thanks in advance
