Most small trucking company owner wants to save on fuel — but some don’t actually know how. They’ll pull into the first truck stop they see, top off the tank, and gripe about diesel prices on the CB. But here’s the truth that separates profitable operators from the ones barely scraping by: your fuel cost isn’t just what you pay per gallon — it’s also how many gallons you burn to make every dollar.

Two drivers can run the same lane, same miles, same freight, and end the week with completely different profit margins. One understands how to work both sides of the fuel equation. The other just fills up and hopes for the best.

Let’s break down the two controllable drivers that determine your fuel economy — Station Selection and Fuel Consumption — and how you can start putting that savings directly into your pocket instead of into the pump.

Part 1 — Station Selection: You Don’t Save at the Pump, You Save at the Card

Every fuel stop decision starts with one question: where are you buying? Because the difference between the best and worst station on your route can swing your weekly profit by hundreds.

You’ve got two ways to pay for diesel: retail price or net price.

Retail is what’s flashing on the sign.

Net price is what you actually pay after taxes, discounts, and rebates.

Smart operators chase net price, not brand loyalty.

Example: Station Selection Savings

Let’s say you’re running 2,500 miles a week and averaging 7 MPG.

That’s 357 gallons burned per week (2,500 ÷ 7).

Now let’s compare two stations:

Station	Retail Price	Discount	Net Price	Weekly Fuel Cost
TA in Nashville	$3.83	$0.00	$3.83	$1,367
Speedway in Jackson	$3.52	$0.12	$3.40	$1,213

That’s a $154 savings in one week — just from choosing a smarter stop. Multiply that by 52 weeks and you’ve saved over $8,000 a year without driving a single extra mile.

How to Make Smarter Fuel Buys

1. Use fuel network apps (OTR, Mudflap, or NASTC) — they show you real net pricing, not the billboard price. Plan your fuel by route, not emotion. That “big brand” stop might cost you 30¢ more per gallon for the same fuel. Know your fuel tax states. In states like Illinois, the pump price looks cheap but has higher tax baked in — and you’ll pay it later at IFTA. If you’re not planning your fuel, you’re gambling your profit. Every stop needs a purpose — not just a parking space.

Part 2 — Fuel Consumption: The Real Game Is in the Burn Rate

Now let’s move from what you pay to how you burn it.

Because once that diesel’s in your tank, you control how efficiently it gets used. And that’s where drivers can quietly pick up thousands in annual savings without ever touching the price per gallon.

Your fuel economy (MPG) is your burn rate — and every tenth of a mile per gallon counts.

How to Calculate MPG the Right Way

1. Start with your odometer or trip miles. Record gallons filled (use full-to-full method). Divide miles by gallons.

Example:

You drive 1,400 miles and refill with 200 gallons.

1,400 ÷ 200 = 7.0 MPG

That’s your true MPG, not what your dash computer estimates. Always calculate it yourself — because your truck’s onboard reading can be off.

How MPG Impacts Your Wallet

Let’s run a side-by-side comparison.

MPG	Gallons Used (2,500 miles)	Weekly Fuel Cost @ $3.76	Annual Fuel Cost (52 weeks)
6.0 MPG	416 gal	$1,564	$81,328
6.5 MPG	384 gal	$1,442	$74,974
7.0 MPG	357 gal	$1,343	$69,836
7.5 MPG	333 gal	$1,252	$65,104

Difference between 6.0 and 7.5 MPG = $16,224 saved per year.

That’s not theory — that’s math.

A small change in habits (speed, idling, shifting in manuals, and route discipline) can even buy you a year’s worth of truck insurance or new steer tires.

The Big Four Fuel Killers

If your MPG is low, it’s usually because of these:

1. Speed: Every 1 MPH over 65 burns roughly 0.1 MPG. Idle Time: One hour of idling uses about a gallon of fuel. Tire Pressure: Under inflated tires can cost 0.5 MPG or more. Load & Route Management: Heavy freight on steep grades = bad fuel. Example:

If you idle 4 hours per day, that’s 28 gallons a week.

At $3.76/gal, that’s $105 a week — or $5,460 a year just to keep the truck humming while parked.

Add that to poor route planning or running 70+ MPH all day, and you’re leaving thousands a year on the table in wasted fuel.

Bringing It All Together — The True Cost Per Mile

Let’s connect the two pieces:

Driver A buys cheap fuel but runs hard at 70 MPH.

Driver B buys smart fuel and runs disciplined at 65 MPH.

Category	Driver A	Driver B
MPG	6.2	7.4
Fuel Price	$3.65	$3.40
Weekly Miles	2,500	2,500
Weekly Fuel Cost	$1,472	$1,149
Annual Fuel Cost	$76,544	$59,748

That’s $16,796 difference per year — same miles, same freight, just smarter execution.

That’s the power of combining station selection with fuel consumption discipline.

Quick Steps to Master Both Sides

1. Track your MPG weekly.

Use a spreadsheet or app. Know your baseline so you can measure progress.

2. Pre-plan fuel stops.

Use discount apps or fuel network maps before you start your week.

3. Set speed control discipline.

Cruise control or smart pedal management at 62–65 MPH saves thousands annually.

4. Reduce the idle time.

Invest in an APU or idle-reduction system if possible — it pays for itself fast.

5. Check tire pressure daily.

Even a 10 PSI drop in one tire can drag your MPG down by 1–2%.

Q&A Section

Q: What’s the national diesel average right now?

A: As of this week, the DOE Diesel Price Per Gallon sits at $3.76, with recent swings between $3.45 and $3.83. Plan your fuel stops using this as your baseline reference.

Q: What’s a “good” MPG for an owner-operator?

A: Depends on your truck. 7.0–7.5 MPG is the sweet spot for most modern trucks. With aerodynamic tractors, you can see 8+ MPG if you drive smart and keep idling low.

Q: How can I track my improvement?

A: Use a simple formula each week — Miles ÷ Gallons. Record it after every fill-up. Watch your average climb as you adjust habits.

Final Thought

Fuel is your biggest controllable expense — and your biggest opportunity.

Every smart decision, from where you buy to how you drive, turns wasted fuel into profit. You don’t need a new truck to get better fuel economy — you just need new habits.

The best carriers track this weekly. The best drivers treat it like a game they plan to win.

And if you start focusing on both price per gallon and gallons per mile, you’ll find out real quick that the road to better profits doesn’t start at the fuel island — it starts with discipline behind the wheel.