Fuel Optimization Strategies for Owner-Operators

Why Fuel Efficiency Matters

Fuel is typically 30-40% of your operating costs. Improving your MPG by just half a mile per gallon can save thousands annually.

The Math:

• Average: 100,000 miles/year at 6.0 MPG = 16,667 gallons
• Improved: 100,000 miles/year at 6.5 MPG = 15,385 gallons
• Savings: 1,282 gallons
• At 4.00/gallon=∗∗4.00/gallon = **4.00/gallon=∗∗5,128 saved per year**

Driving Habits That Save Fuel

1. Manage Your Speed

Speed is the #1 fuel killer. Aerodynamic drag increases exponentially with speed.

Speed	Approximate MPG Impact
55 mph	Baseline (best MPG)
60 mph	-5% MPG
65 mph	-12% MPG
70 mph	-20% MPG
75 mph	-30% MPG

Sweet spot: 62-65 mph balances fuel economy with productivity.

2. Use Cruise Control

• Maintains steady speed (no speed fluctuations)
• Prevents unconscious speeding
• Most effective on flat highways
• Disable on hills—your foot is smarter than cruise on grades

3. Progressive Shifting

• Shift at lower RPMs (1,200-1,400 RPM for most engines)
• Don’t lug the engine, but don’t over-rev either
• Skip gears when appropriate (especially when empty)
• Let the turbo work efficiently

4. Anticipate Traffic

• Look ahead 15-20 seconds
• Coast to slow down rather than braking hard
• Avoid stop-and-go acceleration
• Maintain momentum on hills

5. Minimize Idling

Idling Time	Fuel Burned	Annual Cost (8 hrs/day)
1 hour	0.8-1.0 gallons	$1,200-1,500/year
8 hours	6.4-8.0 gallons	$9,600-12,000/year

Alternatives to idling:

• APU (Auxiliary Power Unit): Uses 0.1-0.2 gal/hr
• Shore power at truck stops
• Battery-powered HVAC systems
• Idle management systems (auto shut-off)
• Park in shade during summer

Vehicle Maintenance for Better MPG

1. Tire Pressure

Under-inflated tires dramatically hurt fuel economy.

Tire Condition	MPG Impact
Properly inflated	Baseline
10 PSI under	-1% MPG
20 PSI under	-2.5% MPG
30 PSI under	-4% MPG

Check tire pressure:

• Weekly at minimum
• When tires are cold
• All 18 wheels (don’t forget trailer)
• Consider automatic tire inflation systems

2. Wheel Alignment

Misaligned wheels create drag and uneven tire wear.

• Check alignment every 50,000 miles
• After hitting curbs or potholes
• When you notice pulling or uneven wear
• Proper alignment can improve MPG by 1-2%

3. Air Filters

Clogged air filters restrict airflow to the engine.

• Check every 15,000-20,000 miles
• Replace when visibly dirty
• More frequent in dusty conditions
• Clean air = efficient combustion

4. Fuel Filters

• Replace per manufacturer schedule
• Clogged filters reduce fuel flow
• Can cause injector problems long-term

5. Engine Tuning

• Keep up with scheduled maintenance
• Don’t ignore check engine lights
• Ensure DEF system is functioning properly
• Consider EGR cleaning if applicable

Aerodynamics

At highway speeds, 50%+ of fuel is used to overcome air resistance.

Tractor Aerodynamics

Feature	Potential Savings
Roof fairing (properly adjusted)	5-10%
Side extenders/gap reducers	1-3%
Fuel tank fairings	1-2%
Drive wheel covers	0.5-1%
Aerodynamic mirrors	0.5-1%

Key: Fairings only work if properly adjusted to match trailer height. Mismatched fairings can actually hurt MPG.

Trailer Aerodynamics

Feature	Potential Savings
Trailer skirts	4-7%
Trailer tails	1-5%
Boat tail devices	2-4%
Wheel covers	0.5-1%

Note: If you pull company trailers, you may not control these features. But if you own your trailer, these upgrades pay for themselves.

Habits That Help

• Close cab gaps when possible
• Keep windows up at highway speeds
• Don’t over-fill the fuel tank (fuel spillage + weight)
• Remove unnecessary accessories that create drag

Fuel Purchasing Strategy

1. Use Fuel Cards with Discounts

Card/Program	Typical Discount
Pilot Flying J (MyRewards)	$0.05-0.10/gallon
Love’s (My Love Rewards)	$0.05-0.08/gallon
TCS Fuel Card	$0.03-0.05/gallon
Comdata/Fuelman	Varies by location
RTS Fuel Card	$0.04-0.08/gallon

Stack discounts: Use apps like GasBuddy or Trucker Path to find cheap fuel, THEN apply your fuel card discount.

2. Plan Fuel Stops

• Check prices before you need fuel (don’t wait until empty)
• Fuel in states with lower fuel taxes when possible
• Avoid premium-priced fuel at rest areas
• Consider fueling during off-peak times

3. Fuel Tax Considerations

State	Diesel Tax/Gallon
California	$0.98
Pennsylvania	$0.78
New Jersey	$0.49
Oklahoma	$0.16
Texas	$0.20

IFTA balances this out somewhat, but buying more fuel in low-tax states can still help cash flow.

4. Don’t Top Off

• Fill to 95%, not 100%
• Fuel expands when heated—overfilling can cause spillage
• Excess fuel weight slightly hurts MPG
• Save the top-off for when you’ll use it quickly

Weight Management

Every 1,000 lbs of excess weight costs approximately 0.5% in fuel economy.

Tips:

• Don’t haul unnecessary items in the cab
• Carry only required tools and equipment
• Keep DEF tank appropriately filled (not overfilled)
• Consider lightweight components where practical

Fuel Economy Monitoring

Track Your MPG

Calculate after every fill-up:

MPG = Miles Driven ÷ Gallons Purchased

Keep a log:

• Date
• Odometer reading
• Gallons purchased
• Calculated MPG
• Notes (weather, load, route)

Identify Patterns

Watch for:

• Sudden MPG drops (maintenance issue?)
• Consistently low MPG on certain routes
• Seasonal variations
• Correlation with driving habits

Use Technology

• Most modern trucks have MPG displays
• Review your ELD data for speed patterns
• Some apps track fuel economy automatically
• Compare your MPG to fleet averages

Quick Reference: Fuel Savings

Strategy	Potential Annual Savings
Reduce speed 5 mph	$2,000-4,000
Reduce idling 4 hrs/day	$3,000-5,000
Maintain proper tire pressure	$500-1,500
Use fuel card discounts	$1,500-3,000
Improve aerodynamics	$1,000-3,000
Progressive shifting	$500-1,000

Total potential: $8,500-16,500/year

Key Takeaways

1. Slow down — Every mph over 60 costs money
2. Stop idling — APU or shore power pays for itself
3. Check tire pressure weekly — Low pressure = wasted fuel
4. Use fuel discounts — Stack card rewards with cheap stations
5. Track your MPG — You can’t improve what you don’t measure
6. Maintain your truck — A well-tuned engine runs efficiently

RigProfit tracks your fuel purchases and calculates your MPG automatically, helping you spot trends and opportunities to save.