I am new to the group! i have read lots of post and love the info. i bought a 2000 zx3, stick shift. and it isn't haveing great gas milage, about 170miles per tank. i get 220 miles a tank in my Kia sportage, i know the tank is smaller than the Kia but, hey, i thought smaller car, further gas mileage..lol the thermastat went past 12 last night, reaching the red for a minute or 2, got home,checked the water and all that, took it to Jiffy Lube this morning and had the radiator flushed and the coolant added.(went ahead and got the oil changed and fluids topped off) drove around most of the day w/the air on (no rise in the gauge)and then went one last trip out, about 3 miles and the temp gauge went up again, almost to the red. no air on, during this short trip. any suggestions on what can be done? it also seems like the car preforms a bit better, w/the air off, speed wise.lol i love driving this car!