'08 Accord LX i4 5spd. A.T. sedan
Fill'up: ~16 gallons per fill'up (+/- 0.5 gallons); ~$2.65 per gallon for 87-Octane (+/- $0.10 per gallon)
Cost: ~$42.40 per fill'up for 16 gallons @ $2.65
Fuel Economy: ~23.5 miles/gallon average w/ 75% city & 25% highway (+/- 1 mile/gallon)
Notes:
- I use OEM oil-filter & Pennzoil synthetic motor-oil
- I get ~5 miles/gallon more if it's 75% highway & 25% city
- The ethanol additive got more common a year or so ago locally, which affects my fuel-economy by ~2.5 miles/gallon.
- For a mid-sized family sedan that has full-size interior room, I'm ok w/ my fuel-economy though I'd wish it was higher. But, I'm sure a lot of it is due to the type of driving (not as much highway cruising), A/C on high for at least 8 months of the year, ethanol additive, an i4 getting a mid-size sedan to move initially, etc.
- Factors such as clean engine oil, clean air filter, properly inflated tires, and driving-style all can noticeably affect the fuel-economy.