So there was like 2 other threads about thermostats but I thought I would start my own to document my problem and the results.
Here is my 22 minute drive to work this morning. it was about 45 degrees F out this morning. My commute is mostly highway (with stoplights as you can see by the vehicle speed)
As you can see, my coolant temp never went over 75 degrees Celcius, but of course the idiot dash gauge displays 190F (which is 88C).
Is this normal? I've been fighting bad gas mileage for the past year or so. I already have a new thermostat on the way from the IDparts, so we will see if that fixes it and I will be reporting back to this thread. I've never replaced it, and I've owned the car for 55k miles since 2009.
The coolant temp sensor was new 25k miles ago, so I'm pretty sure its not that.
It was about 70 degrees F when I got out of work, and I didn't log it, but I went on a very spirited 35+ minute backroad run and when I got home, my coolant temp was at 77 degrees Celcius.
Here is my 22 minute drive to work this morning. it was about 45 degrees F out this morning. My commute is mostly highway (with stoplights as you can see by the vehicle speed)

As you can see, my coolant temp never went over 75 degrees Celcius, but of course the idiot dash gauge displays 190F (which is 88C).
Is this normal? I've been fighting bad gas mileage for the past year or so. I already have a new thermostat on the way from the IDparts, so we will see if that fixes it and I will be reporting back to this thread. I've never replaced it, and I've owned the car for 55k miles since 2009.
The coolant temp sensor was new 25k miles ago, so I'm pretty sure its not that.
It was about 70 degrees F when I got out of work, and I didn't log it, but I went on a very spirited 35+ minute backroad run and when I got home, my coolant temp was at 77 degrees Celcius.
Last edited: