Thanks Aerohead for the input. I think the weather is crap now to compare anything unless it's same day and same direction of travel.
Yesterday I was annoyed at the MPG and didn't have time to test A-B-A for 200 miles. So I decided to try a top speed test.
Previously the car mainted 94 MPG on level ground and around 99 max. Yesterday It held 100 to 101 on level ground and 106 with a nice hill to get a running start. So I'm pretty sure aerodynamics must be a little better.
The bad part is I think I blew a headgasket....
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