TallGrass wrote:You could explore "hypermiling" with your Tacoma such as .... seeing if they make a taller rear end (gear ratio),
Can we go back to this one for a minute? I have not done very much homework on this so I may well be wrong, but I do wonder about it.
On the surface this makes sense since the tires would be rotating less and thus the engine using less gas, for the same miles driven. However, isnt there more to it? Primarily, the idea that engines (actually not only the engine but the entire drivetrain and even the overall vehicle itself) are tuned as a system - generally to make best use of the engines torque curve. So that if you changed the gearing to a numerically lower number it is possible that the engine is actually becoming less efficient and instead using more gasoline rather than less?
I have a personal example of this - whether or not this example proves anything or is just one example under very specific conditions or not, I dont know, but empirically it seems to make sense: My last Jeep was lifted and running on 33 inch tires (the stock tires were maybe 29 inches or so) but not re-geared. Anyway, the times I got the best gas mileage was when I was going up mountain passes in 2nd gear. ie better MPG when the engine was running at a higher RPM. My explanation is that the engine was operating closer to its peak torque at this higher RPM and thus more efficient.
Maybe the idea of a re-gearing would work, but only as long as if it didn't push the engine too far outside its torque band.