My trip odometer said 382.6 miles (actually it was halfway between .6 and .7 so I calculated as .65, so 382.65) on one tank. My fuel light had just begun to flicker at 375 miles, but was staying on more steadily once I pulled into the gas station.
I filled the tank up with 13.452 gallons of gas...
... and that calculates out to roughly 28.44 mpg.
Granted, almost all of it was highway driving between Saturday and today. I drove to Gainesville, home of the Gators, to get a used WRX timing belt from petridish38 (who still has his Legacy, but doesn't drive it much anymore), and then drove to my girlfriend's house on the east coast, by the Kennedy Space Center, and then to work this morning. And my A/C's still not working, so I wasn't using it obviously.
But this was with the cruise set at 80mph about 80% of the time, with a 173k-mile 91 Legacy, with 15k-old spark plugs (which is about all copper BKR6E11 plugs are good for), with two known noisy wheel bearings and a misaligned driver's door that makes wind noise, and with an ORIGINAL O2 sensor.
... getting 28.44 mpg and going 382.65 miles on one tank.
