HT4100 4.1, 4.5, 4.9 Discussion, Whats The AVG MPG Readout for this forum in Cadillac Engine Technical Discussion; I hear ya there buddy, damn HT4100's, 8-10 MPG and slow as all hell up hills. It gets good MPG ...
My 95 Deville was setting on 20.2 when I pulled in the garage this evening. That is over the course of all types of driving for the last 600 miles. I don't have a lead foot though. I am pretty happy with that. I just bought the old girl on 11/19/2010 and she has 86,000 miles on the dial.
City driving - 16 to 19 depending on my patience and pedal mood
Highway - If I drive at 59, no idea why its the key speed, I get 33 on flat roads and 25 steadily. But thats with patience, in a 70 zone being passed so much is testing for me haha