TAlKED WITH RADIATOR TECHNICIAN ON 180 STAT. - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-12-2004, 11:47 PM   #21
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I recomend Changeing to a 195 during the winter this winter was the first time my car ran on a 180 thermostat and it never reached good operateing temp, i was filling her up every 200 miles the temp in michigan is usually between -5 and 32 degrees during the winter so yeah i spent about 400 on gas this winter rough estimate probably more then that. it ran great during the summer and when its between 40 and 90 degrees
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Old 04-13-2004, 12:27 AM   #22
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No problems with my 180, now at 122,150 miles. I run cooler for the most part, even in the city I tend to stay under 200* unless I'm sitting forever. Good enough for me
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Old 04-14-2004, 01:20 AM   #23
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Speedy -- the entire cluster is electrical. If i remember right, you're going to have to get an entire cluster to fix the trip odometer
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Old 04-15-2004, 05:44 AM   #24
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There is a concern that running too cool will cause the engine to run more rich (choking), resulting in increased fouling, deposits, and unburned fuel getting past the rings (blow by) contaminating the crankcase. But I really don't think a 180' stat is too cold to cause any of that too happen on a meaningful scale, unless one lives in a region where it is cold most of the year. In hotter areas of the country, a 180' stat may even be a wiser choice as the daily temperatures approach or exceed 100', particularly those densely populated areas where one often finds themselves doing an average of 10MPH on jammed expressways radiating 160+ surface temperatures.

However, I do believe 180' is about the lower limit here promoting optimal combustion and proper mixture. I would neither recommend drilling a 180' or going as low as 160' if one is at all concerned about reduce engine life and poor fuel economy. Some people don't mind the trade-off if they believe there is a performance gain
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