The Best Fuel Optimization Software for Trucking Fleets (2026)

Most "fuel software" for trucking doesn't actually optimize your fuel. It finds cheap stations, tracks spend, or reports IFTA. True optimization answers two harder questions — which stops, and how many gallons at each — on true, post-IFTA cost. Only a handful of tools do that. This guide shows which ones, how they differ, and who each is best for.

Why Fleets Go Looking for Fuel Optimization Software

Fuel is most fleets' #1 or #2 operating cost, and the waste doesn't come from bad contracts — it comes from how fuel gets bought on each run:

• Drivers "fill up when low" at the nearest station, not the cheapest one within range.
• Contracted network discounts go unused because dispatch doesn't know which stops qualify.
• Comparing pump price ignores IFTA — you pay tax on miles driven, not gallons bought, so the sticker price isn't the real cost.
• Over-filling at expensive stops carries dead weight and inflates every trip.

The math — millions of stop-and-fill combinations against prices that change daily and a different tax at every border — is too complex to do by hand. That's what fuel optimization software is for.

Five Questions That Separate Optimization From "Finding Cheap Fuel"

Use these to cut through the marketing — this is where the real differences show up:

1. Does it tell you how many gallons to buy at each stop — not just where's cheap? The money is in buying a little at expensive stations so you reach the cheap one with tank room to load up. Cheap-station finders skip this entirely.
2. Does it optimize on true, post-IFTA cost — or the pump price? State taxes settle on miles driven; optimizing on sticker price gets the wrong answer at state lines.
3. Does it use your contracted network prices — or just retail plus one card's discount? Your negotiated rates are the whole point.
4. Does it fit how you already operate? No new hardware, no driver app to adopt, no rip-and-replace of your TMS — and does someone do the integration for you?
5. Can any fleet size actually buy it? Some real optimizers are enterprise-only and quote-priced. Others are self-serve with public per-truck pricing.

Comparison at a Glance

Competitor pricing is indicative; several are quote-only. Verified July 2026.

The Tools in Detail

OptiMile Pro

A fuel planning platform built for OTR fleets. It generates a globally optimized plan before the truck rolls — exactly which stops and how many gallons at each — weighing your contracted prices, route, tank capacity, detours, each driver's measured MPG, and the IFTA state-tax math at every border. Plans go to drivers by SMS, and OptiMile's team does the TMS and telematics integration for you, so nothing changes about your routes, contracts, or dispatch tools.

Best for: any OTR fleet with contracted pricing and multi-state routes. Watch-out: least additive for fleets with no negotiated rates — if there's no contract network to optimize across, you're not the ideal fit.

ProMiles

A roughly 40-year-old routing, fuel-tax, and fuel-optimization suite. Its paid Fuel Opt is a genuine fill-amount optimizer — it will have you buy a minimum at one stop to reach a cheaper one later — and it compares prices net of refundable fuel tax. Real IFTA-aware optimization, at a low entry price. (Its free "Fuel Finder" app, by contrast, is cheapest-station only.)

Best for: owner-operators and small/mid fleets that want proven optimization at the lowest entry cost. Watch-outs: dated interface with a learning curve, a desktop product that needs paid upgrades for current road and toll data, and largely quote-based pricing.

Trimble Expert Fuel

The enterprise fuel-purchase optimizer in Trimble's TMS suite. It sends drivers exact gallons per stop ("buy the max where cheap, the min where expensive"), factors IFTA and out-of-route miles, and validates driver compliance after the fact. On optimization substance, a real peer.

Best for: large truckload fleets already running Trimble TruckMate or TMW.Suite with in-cab mobile comms. Watch-outs: enterprise-only, no public pricing, no self-serve, and it effectively requires the Trimble TMS stack — out of reach for most small and mid fleets. Naming clarity: this is Expert Fuel — not "Fuel Dispatch," which is a separate TMS for companies that haul fuel to gas stations.

PC*MILER — the "doesn't it already do this?" myth

PC*MILER is the industry-standard truck routing and mileage engine, and it produces the state-by-state miles you file IFTA on. But base PC*MILER does not optimize fuel purchases. If someone says "we already have PC*MILER," they have best-in-class routing — not a fuel-buy plan. We wrote a full breakdown of this one.

Fuel-card apps and discount networks

TCS Fuel Finder, AtoB FuelMap, RTS, Comdata, Mudflap and the rest negotiate a per-gallon rate and, at best, show the cheapest station along your route. None computes how many gallons to buy per stop or folds in the state-tax spread. They're valuable — and fully complementary to a real optimizer: you keep the card's rate and add the fill plan on top.

Telematics platforms (Samsara, Motive, Geotab)

Excellent at fuel efficiency — MPG, idling, coaching — plus theft detection and IFTA reporting. They don't tell a driver how many gallons to buy where. In fact, OptiMile plugs into Samsara, Motive, and Geotab to read each driver's real MPG: they're inputs to optimization, not optimizers themselves.

Which Should You Choose?

• Owner-operator or small fleet, price-sensitive, OK with older software: ProMiles.
• Large fleet already all-in on Trimble TMW/TruckMate: Trimble Expert Fuel.
• You just want the cheapest station and a discount rate: a fuel-card app — but know you're leaving the fill-amount and tax savings unclaimed.
• You want true post-IFTA optimization on your own contracts, delivered to drivers, with the integration done for you — at any fleet size: OptiMile Pro.