Im trying to get some better gas mileage out of my wife's 2001 Altima. She's getting about 22mpg with mix driving. I put in a 195f thermostat and just recently purchased a scangauge. Im noticing the radiator fans are coming on much more than before and according to the scangauge I have a water temp of 220f. I pulled the thermostat and tested in a pot of hot water and it does open completely at 195f. Is 220f too hot?
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