Frequently Asked Questions
How do I find current gas prices?
GasBuddy.com and the AAA Gas Price Finder show current prices by zip code and grade. Most navigation apps including Google Maps and Waze display nearby station prices. For trip planning, use the average price along your route rather than current prices at your home location.
Does the grade of gasoline (regular vs premium) significantly affect MPG?
For most modern cars, using regular 87-octane instead of premium 91/93 in an engine that requires premium will lower MPG by 2-4% due to ignition timing retard. In engines tuned for regular, using premium provides no benefit. Always use the grade specified in your owner's manual.
How do I estimate annual fuel spending?
Multiply your daily commute (round trip) by 250 working days to get commute miles, add estimated personal driving, then divide by your actual MPG and multiply by the average local gas price. Alternatively, just multiply annual miles by your per-mile fuel cost from this calculator.
What is a fair way to split gas costs on a road trip?
Divide total fuel cost by the number of passengers to get an equal split. Alternatively, the driver often absorbs the cost since they are driving, and passengers pay for meals or lodging. Another fair method: each passenger pays for one tank fill-up in rotation. This calculator's total gives the number to divide.
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Estimates for informational purposes only.
Important Disclaimer: Estimates for informational purposes only.
This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.