2016 Scion TC low gas mileage
Hi Scotty & Everyone. I recently bought this car. It's fine except I only get 23 mpg's average. It should be 23/31, I do mostly highway driving, using "ECO" mode and cruise control. Automatic/ 38,000 miles.
1. Are your cold tyre pressures good?
2. Is your air filter clean/new?
3. When was the last time your throttle body was cleaned?
4. Do you change your oil regularly?
5. Do you have a sedate driving style?
6. Any codes?
7. Any aftermarket parts fitted?
What's in the car? meaning, is trunk and back seats empty or are you hauling around unnecessary added weight?
Also, are you in a part of the country where it's still cold? If so winter blend gas gives lousy gas mileage. Once summer blend is available you should get better mpgs.
During the months here when gas is winter-blend my mpg's go down a few to about 25, and during warm weather when gas at the pumps is summer-blend my mpg's goes up to about 28+ and this is driving a 2019 V8 Camaro SS. Here in NC the switch over is mid-May and mid-October.
So your tC is 5 yrs. old with 38k miles. Hasn't been driven much over the 5 yrs. that's 7600 miles per year or 633 miles per month. That's not much, so it's been used to being driven very little and short trips. Also, don't go by what the mpg's the car says, there's quite a bit of error margin. I calculate at each fill up and reset my trip A each time to figure real mpg's.
One thing the 23/31, is under ideal conditions and the best numbers that were returned during testing to report to the gov. However; you should be getting better than 23 mpg's. Avg. combined real world is probably more like 26. Heck, I'm getting better mpg's with my V8 muscle car, so something is holding it back or may just be the way your particular tC runs. But it is at a point to be changing the trans fluid, and consider cleaning the MAF, throttle body plates, change fuel filter, have injectors checked out. How much you want to do to get a few more mpg's. Shoot, you might also just need to take it on a longer trip and "air it out".