My car has been chewin up alot more gas then usual lately. one of my buddies told me that my temperature is too low. so i need to get a new thermostat. which one do i get though, there are 3 temperatures, (170,180,190), Which will be good for my teg ls?

 

When warm the temp gauge the needle should be around the middle of the gauge. Just order an OEM thermostat, higher quality than most parts store single stage thermostats.