The other thing to remember, of course, is that if a simple change of filter or canister would have any significant change in power, torque, or gas mileage, the auto companies would be all over it, and would make those changes right on the production line.
The government's gas mileage requirement on new car manufacturers is really tough to meet. If putting in a different air filter would boost mileage by 10%, and add maybe $1 to the retail price of the car, do you think Ford, Chevy, Toyota, Honda, et al, would ignore that? Not hardly!
And given that the first thing any auto magazine's new-car reviewer does is talk about INCREASED HORSEPOWER OVER LAST YEAR'S ENGINE!, do you think the auto companies would ignore a nearly free change that would bring in bigger numbers? Again, not hardly!
No matter what you think of the automakers, they aren't stupid. The aftermarket engine-accessory companies want you to forget that.
Bill
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