I wonder how much climate and elevation play into this ....
I'm in Alberta where there is two seasons - winter and construction. It's usually fairly dry and the altitude is about 700 metres.
I guess everyone's success with different things depends on a number of factors.
My 2.7l suzuki V6 liks the mobile and the k&n
the lil ford 2.0l ztec likes it as did my 4ze1 trooper -before I began the restoration.
I've never driven in Virginia though, so I can't say what would happen in your climate, elevation and humidity. <img src="/forums/images/graemlins/cheers.gif" alt="" />
A clean, brand new air filter will always improve mileage. A good investment before a long trip. <img src="/forums/images/graemlins/smile.gif" alt="" />