Updated April 5, 2026 — Prices updated regularly from EIA data
$4.20
Diesel Fuel (N/A octane) per gallon
About Diesel Fuel in Fort Collins
Today's diesel price in Fort Collins, Colorado is $$4.20 per gallon. Despite being {comparison} regular unleaded, diesel engines typically deliver 25-35% better fuel economy, making the per-mile cost highly competitive.
When to Use Diesel Fuel
Best for: commercial and towing
Vehicle types: diesel trucks and commercial vehicles
All Diesel Fuel sold in Fort Collins must meet minimum federal standards. TOP TIER certified stations add extra detergency additives. Most major brands (Shell, Chevron, Costco, Wawa) are TOP TIER certified. Non-certified independents meet legal minimums only.
In Fort Collins, Diesel Fuel is priced at $$4.20 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.
