Off-Road Diesel Delivery: Construction Guide

Off-road diesel — also called dyed diesel or non-highway diesel — is the legally correct and most cost-effective fuel for construction equipment, generators, and other off-road machinery in Florida. Delivered directly to your job site, it eliminates the time and cost of equipment hauls to fuel stations, keeps machines running through long shifts, and saves $0.25 to $0.45 per gallon versus on-road diesel due to the federal highway tax exemption. Here is everything you need to know.

What is off-road diesel?

Off-road diesel is ultra-low-sulfur diesel (ULSD, ≤15 ppm sulfur) that has been dyed red with Solvent Red 26 or Solvent Red 164 — chemical markers required by the IRS to identify tax-exempt fuel. The dye is the only physical difference from clear on-road diesel. The fuel chemistry, combustion characteristics, and engine compatibility are identical.

The price difference reflects the federal highway tax exemption: on-road diesel includes $0.244/gallon in federal highway tax plus applicable Florida state taxes. Off-road diesel is sold tax-exempt for qualifying off-road uses.

Qualifying uses for off-road diesel in Florida:

• Excavators, bulldozers, graders, scrapers, and other construction machinery
• Forklifts, telehandlers, and aerial work platforms
• Cranes and lifting equipment
• Stationary generators (backup power and temporary power)
• Agricultural equipment
• Marine vessels (check with your accountant on specific vessel type rules)
• Railroad locomotives

The $10,000 federal fine for misuse — what you need to know

Using dyed diesel in any on-road vehicle is a federal offense under 26 U.S.C. § 4082. The IRS and state fuel tax enforcement agencies conduct random roadside inspections — a fuel sample from the tank is tested for dye. If dye is detected in an on-road vehicle, the penalty is the greater of $10,000 or $1,000 per gallon, applied per vehicle per violation. This is not a theoretical risk: Florida conducts joint IRS/FDLE enforcement operations periodically, particularly targeting construction fleets.

The practical takeaway: separate your on-road and off-road fuel storage clearly. Never cross-fill. Train your drivers on which equipment takes which fuel. If you have any doubt about whether a piece of equipment qualifies for off-road fuel, use on-road diesel — the tax savings are not worth the fine.

How job site fuel delivery works

Construction site fuel delivery is more logistically complex than fleet yard delivery. Here is how it works:

1. Site survey: On a new account, we conduct a brief phone survey of your site layout, access constraints, and equipment inventory to plan the delivery approach. Active construction sites change daily — a good driver knows to call ahead on the morning of delivery.
2. Delivery vehicle selection: Depending on site access, we use either a standard tanker (5,000–9,000 gallon capacity) or a smaller lube/fuel truck for tight sites. Sites with narrow access roads, weight-restricted bridges, or multi-level structures need the smaller truck.
3. Equipment fueling: On-site, the driver dispenses fuel directly into each machine using a metered hose. Volume per machine is recorded on the delivery ticket. Some sites prefer a temporary bladder tank or portable tank for machines to fuel themselves — we can accommodate this if you provide the storage.
4. Delivery ticket and invoice: You receive a delivery ticket with per-machine volume on site, and a digital invoice within 24 hours.

Scheduling fuel deliveries for active job sites

Construction sites have unique scheduling challenges. Best practices for South Florida job sites:

• Schedule around crane picks and concrete pours: Heavy lifts and pours require clear site access that conflicts with fuel truck movements. Coordinate with your site super to block out fuel delivery windows — typically early morning before heavy operations begin, or during lunch breaks.
• Account for weather: Florida afternoon thunderstorms (June–September) can make tank access difficult and create slip hazards during fueling. Morning delivery windows are safer in summer.
• Keep a running equipment inventory: Knowing how many machines are on site and their approximate tank sizes lets you call in a delivery before you are empty, not after. Most construction equipment tanks are 30–100 gallons; a 20-machine site might burn 400–800 gallons per day on a full push.

How much fuel does a construction site need?

Estimating fuel consumption for construction equipment:

Equipment type	Approximate fuel use
Excavator (20–35 ton)	4–10 gal/hr at full load
Bulldozer (D6–D8 class)	5–10 gal/hr
Motor grader	3–7 gal/hr
Wheel loader (mid-size)	3–6 gal/hr
Generator (100 kW)	6–8 gal/hr at 75% load
Generator (250 kW)	14–18 gal/hr at 75% load
Concrete pump	4–8 gal/hr

For a typical South Florida residential or commercial construction site with 8–12 pieces of equipment running 10-hour shifts, plan on 300–800 gallons per day during active earthwork phases. Structural and finish phases burn significantly less. Work with your site super to build a fuel budget into the project schedule from the start.

Exigo Fuels serves active construction sites across Miami-Dade, Broward, and Palm Beach counties with scheduled and emergency off-road diesel delivery. Call (305) 900-6725 or request a site fuel plan online.