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Old 01-18-2019, 10:27 AM   #20
maslin
Benz Tech
 
Join Date: Dec 2018
Drives: 2017 BRZ Premium
Location: Oregon
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Quote:
Originally Posted by 12foot View Post
Thanks for the info everyone.

Filled my tank 2 days ago, reset average and trip, (I don't pay attention to the real-time L/100k reading). I hope the average will come down as theorized in the responses. My reading currently is 15.1 L/100km, I've driven about 20km to work and back. Sat in it for 15 min during a lunch break to get warm, (yup it's cold out, -17°), and raced a guy who decided he wasn't going to let me pass (Please don't judge, I look forward to those moments). So time will tell, but it really does alarm me at the current spike in poor mileage from a month ago. All my previous cars only climbed slightly during idle, not continuously.
I don’t think I would would reset the average and expect anything close to accurate within a short time.

When I picked up my BRZ the average was 14mpg. Drove around town for the first weekend, through two tanks of gas. Average was up to 24mpg. Drove 8 hours on the highway, average climbed to 29mpg. Back around town, DD, errands, average has settled right around 27-28mpg.

It’s a long term calculation. Maybe a Toyota tech could print something out explaining the function?

The trip average on my Tacoma is ruined if I let it idle and warm up for 10 minutes. I can easily top 20mpg driving around for a day. Let it idle and I can’t get it past 10. Short term, using fuel at 0mph upsets the calculation. Long term it will be much more accurate.
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