RPM's & MPG

[Perfectlap]

Originally Posted by stephen wilson

According to the OBC, my 2.7 gets 29 MPG highway @ 70-75 MPH, and 23 MPG in mixed ( and often aggresive ) driving.

29??? have you ever actually reset the trip odometer after a fill up and noted the mileage when the red light came on?

[Lil bastard]

That sounds about right for the Tip S.

It does have an adaptive memory which can learn new shift points correlating to your driving style, but that wouldn't affect the RPM's while cruising.

23MPH is in the 'normal' range for a city/hwy mix, but there are so many other things which effect your Range (MPG), especially your right foot, that you cannot gauge this metric with the RPMs and tranny alone. Tires, Tire condition, Alignment, Load, Accessories used, all play a part.

I once recorded a pure highway cruising MPG of 34.6 as a high, but this was on a fresh oil change, properly inflated tires, using the cruise control, and on relatively flat Interstate for a full tank 400+ miles.

Cheers!

[stephen wilson]

I'm actually doing my first manual check of the mileage now. If that shows the OBC to be accurate, I would assume the figures I saw were realistic. I don't do enough highway driving to confirm that number.

[Topless]

Sounds about right. My car is a 98 5spd with stock motor and no OBC so I measure it the old fashion way. Mileage varies greatly with my right foot:

Mixed driving around town 21-23 mpg
Top up highway driving to San Diego (long straight flat road) 28-30 mpg
Track day 10-12 mpg