I just took my cat to the petrol station to give it a try, and have to report that not only does she not have any indicators like this, she also was vehemently opposed to being refuelled and scratched me up badly.
A friend of mine took their cat to the gas station, after refuelling the cat took a couple of steps and dropped on the floor. I was like "Damn, already out of fuel? What did you say the milage was?"