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Highest gas mileage ever 33.3 mpg 700 1987

posted by  someone claiming to be Al on  Sun Apr 29 15:02 CST 2007 [RELATED]

I couldn't believe my eyes when I filled up after a day trip. The only change from last years best run of 30.5 mpg was the change in oil. Usually I run Mobil One 10W30 but this time I had switched to Castrol Syntec 5W30.
FYI mods, M46, 3.31 rear gears, lowered, synthetic fluids all around, tires inflated to 38-40 psi. I also run a maintenance dose of Auto-Rx in the oil and run Lube Control FP60 in the gas. Also the air filter is an OEM paper unit.
1987 745T with 349,300 miles, engine has 66,700 miles on it.

I have run Mobil One with 5K mile oil change intervals since the day I fired it up. The change to Castrol Syntec was in the last 3K miles.

This trip was limited to a maximum 65 mph and in the 55 mph zones I was running 60-62 mph. I didn't use the AC at all during the trip. The weather was perfect in the 60's and no wind.

I one thing I did notice was how smooth the car accelerated coming out of the rest area up to speed with out using the turbo.






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