I just went on about a 750 mile trip in my '72 MGB, for a job interview (
and for a conjugal visit). Before I left, I had been getting about 26
mpg (imp., 31 mpUSg.). I did some tuning, but the only major change was
that I leaned the carbs back a bit (used Colortune). On the next tank I
got the same (27 mpg), but the second tank, I got 39 MPG! (47mpUSg) I
thought there was a problem with my fuel guage, when the odometer was
reading 200miles and it was just under a half tank. I added 7 litres and
kept going until 340 miles on the odometer! I couldn't believe it.
Explaination? The only diference I could see between the last two tanks
was, I may have kept my speeds below 65 mph, and it was 8-10 degrees
celcius warmer, most of the second tank. The temperature gauge usually
hangs out just below normal, but on the warm day ( I drove about 280
miles) it was at normal or slightly above.
I have been using mostly 89 octane fuel.
________ ___
/ ______/ | | Greg Johnson * See the British Automobile
/ \ ___ | | Biology Dept. Touring Assoc. of NS
\ \_\ \ /\ __| | Dal. University Home Page!*
\______ / \________| Halifax, N.S., Canada
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www.chebucto.ns.ca/Recreation/BATANS/
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