Updated April 5, 2026 — Prices updated regularly from EIA data
$4.55
Regular Unleaded (87 octane) per gallon
About Regular Unleaded in Modesto
Regular unleaded is priced at $$4.55 per gallon in Modesto, California right now. The 87-octane grade is suitable for the vast majority of passenger vehicles and is always the cheapest option at the pump.
In Modesto, Regular Unleaded is priced at $$4.55 per gallon versus ${regularPrice} for regular — a ${diff} per gallon premium. On a 15-gallon fill-up, that's ${fillDiff} extra. Over 50 annual fill-ups, the premium adds ${annualDiff} to your fuel costs.
If your car requires premium and you accidentally fill with regular, modern engines have knock sensors that retard timing to prevent damage. You may notice reduced performance and slightly worse fuel economy. Fill with premium on your next fill-up. This is a minor issue if it happens occasionally.
Follow your owner's manual recommendation regardless of whether the car is new. Engine break-in does not require a specific fuel grade. Use what the manufacturer specifies from day one.
Vehicles requiring Regular Unleaded typically include most cars and trucks. Your owner's manual and the label inside your fuel door specify the required grade. Using a lower octane than required can cause engine knock and reduce performance over time.
