Recently changed my oil, going from 10W-40 to a slightly lighter 5W-30 (both recommended specs for the engine). Standard dino oil, nothing special. Also replaced cap, rotor, wires, and plugs. The electrodes (?) on the old cap and rotor were pretty nasty looking... plugs looked pretty OK though. Those two actions had a pretty significant effect on my last tank tho' ...
53.5 mpg!! That is my best ever by a good 7%!!
Weather was good throughout the tank, with highs generally in the high 80's, low 90's. I'm sure the weather helped as well, but I'm guessing the lighter weight oil had a lot to do with the improvement. Will have I can reproduce these kinds of numbers consistently. If so, this does make it seem that my goal of hitting 55mpg this year without any aero mods (as captured in the
http://ecomodder.com/forum/showthrea...ions-6608.html thread) is actually realistic.
