When fuel clears $6/gallon I'll consider the boat tail. At this point another 10 mpg gain would net about $900 savings a year minus the cost of materials - then the time involved in making a tail with a robust cargo area, which I don't want to think about right now. However, if fuel keeps climbing you can count on a boattail thread coming up.
The results - it did pickup about 2 mpg, bringing the average up to 51-52mpg at 15% city and a lot of mountains that require a lot of braking. It is possible to stay in leanburn a lot longer now, and coasting speeds have increased by 4 mph in some areas.
The extreme elevation swings are killing the economy, but at least the majority of my driving is over 2500'.
Wheel covers are next - hopefully the materials will be cheap on this one, thanks for the help guys
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