My gas mileage dies a bitter death when it gets cold. i'm halfway to work before the coolant is warm. only 9 miles/15minutes from work
I had the same problem on my truck even with a full grill block. since covering about 1/2 the radiator itself with cardboard, it's to 175 in 2 miles, less on highway (50-60 highway), once warm, it wanders 175-190 with the t-stat. my thermometer is also in the bypass/heater hose so it's not quite as accurate as actually being in the housing but it's close.
1991 Toyota Pickup 22R-E 2.4 I4/5 speed
1990 Toyota Cressida 7M-GE 3.0 I6/5-speed manual
mechanic, carpenter, stagehand, rigger, and know-it-all smartass
"You don't get to judge me for how I fix what you break"