Fuel range dropping

I've been driving a 2020 sr5 offroad since August 2020 and after a fill the range has always displayed between 875-910 kilometres. I have a routine of filling at shell stations and always putting 91 in tundra and that hasn't changed since purchasing the truck. But about six weeks ago after a fill I noticed the range read 760km, a big drop from what I'm used to seeing and felt like my truck was drinking that tank fast. On the next fill my range read slightly less, 750km and then the next fill read 745km afterwards. Seems to always be dropping a few km after every fill but I don't notice any changes in performance or responsiveness in the pedal. Has anyone gone through a similar experience with their truck?

 

I've read it changes as your truck learns the real mpg average over time. Reset your truck and it will go back up.

 

Have you been manually calculating your fuel mileage? Do that to determine if your actual usage has changed.

DTE is an estimate not exact science so don't read into it too much.

 

No just going off the display

 

I will try to unplug the battery and reset it

 

Winter fuels man...they've gotten worse...

 

Frankly I would just ignore it and go by your fuel gauge as far as when you need gas. If you monitor that "range" as an indicator something might be wrong, as stated above better to hand calculate your MPG.