squirrel503

I have a 4-switch box from Prowelder and like it a lot. I just got winter fronts and have the block heater on for about 3 hours before I drive it in the mornings. I'm outside Chicago, so it can get relatively cold. I turn on high idle or 3cyl high idle if the engine is cold until coolant is around 80F. IAT is fooled to 143F whenever I'm not warming up. Smarty on 1, TST on 0.My last tank was 495 miles, 24.006 gal, DSL was 3.72/gal, I added 14 oz of 2-stroke (3.50/quart). That is 20.62 mpg and 18.6 cents per mile. I don't drive more than 55 (the limit) and have a 36 mile commute each way; about 20 mi interstate, 6 local highway, and 10 in town-ish. During the summer I tune my truck for performance, not mileage, and get about 117 avg. Over the 13,000 miles I've owned my truck my overall mileage is 19 mpg at an average cost of 21 cents/mile.I can't say for certain what impact the IAT fooler has made considering the other things I've done for mileage. I'll report back later this winter when things are colder and I have a good winter baseline. That way I can remove only the IAT fooler and leave everything else static.