Correct me if I'm wrong, but I believe the 06 V is supposed to get around 27 MPG on the highway and 22 in the city. On one particular trip, it averaged around 30 mpg!!!

But, alas, my V is getting around 22 on the highway now...could it be bad plugs? I've tried to change them before but one of the bolts on the plugs' plastic cover is stuck so I'll need a new set of sockets or vicegrips and a hammer to get it loose...

Please advise of possible causes. I've also considered that 10% ethanol could be a possible cause.

 

Don't use a hammer for pretty much anything on your engine.