Originally Posted by Tra1969
So that's all good information. So all of that may equal out to a 1 to 2 mpg difference. Not the 10 mpg difference I am getting. I sould be getting 30 to 32 NOT 23.8. No if you can find a way to justify that I would really like to hear the answer. I'm looking for anything I can look at to find a solution. If you read eairlier post from me, this is the car that got 29 mpg on a trip from kalamazoo, mi to Chicago, il all highway miles. The car was looked at by the dealership and have not seen 30 mpg's but once since then. And steadly getting worse. But that for the reply but all ready been through all those excesses.
One thing to consider is wind. I drove from Champaign, IL to Omaha, NE a while back against a mostly west wind (it wasn't that strong, maybe 10mph), but that knocked my MPG down to 33-34 instead of the normal 37-38 I get on the same trip (going 65-70mph most the time).
But that would only affect certain/occasional trips... not all.