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Greetings:
Saw this forum and it piqued my interest. Former road racer, fabricator, tuner and driving instructor. I thought it would be interesting to share a little of my car's history with all of you.
I've been driving a 1978 MBZ 300SD for a number of years (MBZ awarded 1 million mile car) and it has always delivered solid 25-26 mpg numbers in basically stock condition. I have increased the boost pressure to 1 BaR but very little has been changed, other than a very good rebuild with gapless rings.
Interestingly, I actually lost mpg when I recently switched from a 3.07:1 to a 2.47:1 axle.
My 440 RWHP 1975 Pontiac Firebird with a 3.42:1 axle would get 15-17 on the freeway with a carb, which is good for a 413 CID motor with a carb, but certainly nothing to brag about here.
My folks have a 2003 Mercuray Grand Marquis that gets 23-25 and it is totally stock with a 4.6 Romeo V8.
Then there is my stock 2001 Mustang with a 3.27:1 axle that knocks down 24-26mpg on a regular basis and on a recent Florida trip, netted 30 mpg (29.85) in Arizona, Louisiana, Mississippi, and Alabama, but dropped back to 25 mpg in Texas, New Mexico and Florida, due in part, I believe, to the oxygenated fuels.
I am interested to see what some of you are doing to pull such ridiculous mileage numbers from your cars.
Regards....
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