I'm taking into account of the weather changes, but our weather here in L.A. has been to say the least cyclical where there's like 30F delta in temps from week to week, so temps are too much a variable. Going back to the fuel, I believe that Shell has better detergents - I guess that is why my automatic sedan feels much more peppier and not to mention getting slightly better mileage. Perhaps it is too early to tell since I have switched to the K&N and Shell for 2 months, so I'll have to keep monitoring and report to y'all later.
the right intake header and exhaust will help with fuel economy. good luck finding that one.
I've never found this to be true. Intake and exhaust mods only help make the car breathe easier when going fast, hauling a$$....but for easy-on-the gas pedel driving for best MPG, redone intake & exhaust do nothing.
I've never found this to be true. Intake and exhaust mods only help make the car breathe easier when going fast, hauling a$$....but for easy-on-the gas pedel driving for best MPG, redone intake & exhaust do nothing.
see i think you misunderstood what i said. there are possibilities that can give you better fuel economy, however for some cars they are not made by manufacturers. its safe to say that most make fuel economy worse, but in theory you can always make an oem system more fuel efficient for the lighter foot.
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don't waste your time or time will waste you
I guess I should point out, though, that the difference, although noticeable, was not huge. Maybe 2-3MPG (or so). Also, it is entirely possible that, given that there are SO many detractors here on this subject, results will probably vary from car to car.