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Old 12-19-2012, 10:02 PM   #8 (permalink)
ECONORAM
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Join Date: Oct 2009
Location: Oklahoma City, OK
Posts: 528

ECONORAM - '07 Dodge RAM 1500 QC SLT flex-fuel
90 day: 18.16 mpg (US)

the Avenger - '08 Dodge Avenger SXT
90 day: 27.06 mpg (US)
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When I had my 84 and 90 Jettas, each with a 1.8L, I saw a similar FE increase. The 84 I was able to set the timing up a few degrees at the distributor--no knock sensor. The 90 did have a knock sensor, and from the factory it had only 4*BTDC at idle. With 91 octane, I was able to bump it to 8* and I recall getting about 2 mpg.
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