most significant change can be a driver..but more not about driving, but opening the mind to flaws over marketing lies and deceipt.Has the geas mileage on a new cars window EVER been correct?
The gear change in the saturn for example. Excellent.
bigger gear ratios for boxers is a LEGEND in same comparision....all on same fuel, hence instant hypermiler..Glad to see that option for the bigger inlines.
I like what I learned here. The big change really is the drivers mind set. Step one no doubt...Doubt it all, you may get someplace if patient...