I posted last week that I had replaced my 190 degree thermostat with a 180 degree in error - - several members pointed out that the origional was a 190 degree and I wouldn't be happy with the 180 degree - - - boy were they right on the money - - - lost 4 mpg the first run out of the box - - -called Geno's and they immediatly sent me a 190 degree thermostat and today was the first run. Boy what a difference, normal running around (hack driving) with about 50% freeway, the mileage is back up where it was - - - THANKS, GENO'S! 
