Re: 1995 Ford Taurus - radiator fan
My vehicle info is in my signature. Also, my '99 3.0L 2V has dual electric fans that push air out (last I checked). They're about 10" diameter each. The fans only come on when the engine reaches a certain temperature. If the vehicle is moving, air will be passing in through the radiator. However, having any type of fan, electric of centrifugal blowing air into the engine isn't good when you're sitting in stop and go traffic, as the hot radiator air will be pulled into a hot engine bay, making matters even worse. This is another reason why a 180F stat can come in handy. Not to mention running the A/C compressor makes under hood temps even warmer.
I run a 180F stat during the summer months and have no issues with shifting and what not. I don't have a transmission oil cooler nor do I tow anything with my Taurus. Don't forget that it takes a good 3-5 minutes before a temp of 190F or greater is achieved, so if you drive the car and the check engine light doesn't come on until it gets up to that temp, then you need not worry as it shouldn't matter if the engine has to run at an exact temp or not. The engine just can't run too cool (like a 160F stat is a no-no), as the PCM will illuminate the check engine light after a prolonged period if the engine isn't up to a certain temperature. 160F stats are for racing only. 180F stats are also meant for racing to keep temperatures down, but they're safe to run in modern automobiles as they decrease heat, which in turn decreases engine wear, wear on rubber lines and wiring, etc. It's a win-win situation.
A guy that I used to know had a '95 Taurus with the 3.0L 140hp V6. He had it slightly built with some aftermarket parts and a custom tune to make it all work well. He ran a 180F stat and the engine still ran great and there was no CEL. Perhaps there are some odd-ball versions out there with different PCM programming, but I've never had problems running a slightly cooler thermostat in any vehicle.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!