Hi All, This may be a bit of a stretch as far as Imperial content, but since they are big cars, and do use a fair bit of fuel, I hope this isn't too far off topic. I have a question regarding fuel economy and acceleration. Not based on my practical desire to conserve fuel as much as the theorietical optimum (read: settle an argument!). I am not interested in cruising economy, as that is pretty straightforward. Regarding acceleration, as I see it, there are two variables; throttle setting and shift point. What combination will provide the most economic run to cruising speed X? Is it wide open throttle and high shift points over a short distance, low throttle and low shift points over a long distance, or something in between? I remember reading about the Mobil Economy Run, where in certain cases it was optimal to use WOT (or near) to accelerate to cruising speed, but conventional wisdom usually states slow acceleration is best. One side is that it is better to accelerate quickly to cruise speed. The counterpoint being that earlier you shift, and the less throttle you use, the better. Which is correct? Thanks for the input on this one. I will reveal later which side I was on... William 83 EFi Edmonton, Canada