Just got my RE92's on Wasabi yesterday. I knew the tires on it weren't LRR BUT I never even noticed they were the wrong size!
Now with the correct tires mileage has shot up just from the few miles I've driven so far! Today I'm going to top off and go for a drive so we'll see how much of an increase I get from a fresh tank.
Sooo, this is just a note to check those tires to make sure some nimrod didn't put the wrong size non-LRR tires on your car if you bought it used.