[wagonman76]

Well so far it is tough to measure, but it appears to have given me about a 5% improvement in FE.

Going downstate last time I had a headwind both ways (entire way south, then the wind shifted north for most of the ride home). I got 38.3 there and 39.5 back.

Last time before that I went into a south headwind downstate I got around 36.5 there then about 42.5 coming back in the tailwind.

The last few days it has actually warmed up, 70F in the sun for part of the day. I got 35.5 one day home from work, never topped 35 before except maybe once. Got 34.5 this morning after sitting all weekend and it was about 40F. Coming home today should do well. I am likely getting a small improvement here too, not much but better than nothing. The wind changes so much it varies but it seems like I am doing a little better overall. In woodsy spots with no wind I am getting about 5 instant mpg better. I think the cold weather has trumped most aero gains, but now it is warmer hopefully I will see more.

The shower liner has stretched a little in the middle, it did almost right away then no more. It has a tad bit of flop at anything below 20 mph, then above that it stays solidly pulled out. So either there is vacuum back there, or it is like the bernoulli effect where the fast moving air across it keeps the pressure low and keeps it taut.

Going downstate last time I got a LOT of looks on the freeway, like probably 3 out of 4 passengers turned around and stared after passing me. Maybe I need a little advertising like an ecomodder.com logo on the back and average mpg.