If we assume the TQ locks up like it should, the speed vs RPM is linear, x%rpms increase = x%speed increase. If it doesn't, then your TQ must not be locking or you are getting a lot of slip somewhere, or your speedo or tach is wacked out. Mathematically it should not work out that 200 rpms gets you 10mph between 70 and 80, and an aditional 200 only gets you 5mph above 80, if anything the increase should be more.

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- 2001 F150 Harley Davidson Special
- 1993 Mazda Miata, wifes car
- 1994 Harley Davidson Heritage
- 1976 Honda CB750K, Original
- 1965 Honda 305 Dream, Original
- 1971 Triumph Trophy 650, Original
- 1971 Norton Commando
- 1970 Honda Trail 90, Original
- Yamaha 500 Short Tracker, racing #69
- 1984 Yamaha Virago 1000, wifes bike
- 1981 Honda Passport 70, wifes bike

 

I agree totally with Norm. I've had my '01 SCREW for 1 year and 21,000 miles now and have tracked EVERY tank of gas that I have put in it. My normal driving to work includes 13 stop signs or light and is a total of 22 miles. Obviously not the best situation for high gas mileage numbers, but what can I say........a mans gotta work. Anyway, my average over the last year is 15.1 mpg. I've had a high of 18.02 and a low of 13.4. I have noticed like many others, that the mileage increases are sizable if you try to keep the RPM's under 2000, keep the tires properly inflated, etc.

 

ScrewKing, I think I have seen you. Are you heading North in the morning? I usually see a King Ranch heading north when I am heading south.

 

I only got 12.75 on my first tank. My average has improved over the last 3000 miles to 14. Some of that is by learning to accelerate much slower.

When the EPA gives expected fuel economy ratings, they give a range for city and a range for highway. I honestly believe they used the median value (the midpoint of the range) rather than mean (average) value. This would explain why so many members get poor (13-14mpg) city mileage, while getting great 19-20 highway mileage.

Also, ave you noticed the huge drop in rpm during the shift to overdrive. What we have is a vehicle with two distinct personalities, "Highway Lean" and "City Mean".