For those of you who rate your fuel selections based on the MPG you got running a specific brand, I assume you have measured and adjusted for the other variables that affect fuel consumption, such as:
- Tire pressure
- Tire alignment
- Engine temperature
- Acceleration/braking pattern
- Percent short trips
- Idling time
- Gasoline BTU variations
- Engine condition/maintenance
- Road type & conditions
- Aerodynamic drag
- Air conditioning usage
- Seasonal gas formulations
- Air temperature
- Air humidity
- Gasoline temperature
- Tire type
- Consistency of fill
- Altitude changes
- Vehicle weight
- Computer MPG accuracy
- Octane rating/accuracy
- Hilly terrain
- Air filter condition
- Traffic jams