How to Protect Your Wallet at the Pump

How to Protect Your Wallet at the Pump

If you’re running a 6.7L Power Stroke, Duramax, or Cummins around eastern Nebraska, you don't need us to tell you that fuel stops hit different these days. Watching the pump tick past $100 before the tank is even half full is enough to make anyone rethink their daily driving habits.

When you rely on a 3/4-ton or 1-ton truck to pull a gooseneck trailer down Highway 275, haul farm equipment around Dodge County, or handle a commute between Fremont and West Omaha, parking the truck isn't an option.

At Tailgate Motor Co., our shop techs routinely inspect and service heavy-duty diesels. Here are five practical, hands-on adjustments we recommend to our truck customers to get maximum fuel mileage out of every gallon.

1. The "Highway 275 Rule": Cruise at 65 MPH Instead of 75 MPH

Aerodynamic resistance is the silent killer of diesel fuel economy. A heavy-duty truck has the aerodynamic profile of a brick wall—meaning the faster you push air out of the way, the exponentially more fuel your engine burns to do it.

1. The Math: Cruising at 65 MPH down the bypass instead of 75 MPH down I-80 drops aerodynamic drag significantly and typically saves 1.5 to 2.5 MPG. Over a 300-mile tank, that’s up to 4 or 5 extra gallons saved.
2. Watch the Turbo Gauge: If your dash has a boost gauge, try driving with it in mind. Spooling the turbo unnecessarily dumps raw fuel straight into the cylinders. Easy, progressive throttle starts keep boost pressures in check.

2. Ditch the Extreme Mud Tires if You're Mostly on Pavement

Aggressive, knobby Mud-Terrain (M/T) tires look incredible on a lifted rig, but they come with a hidden tax at the pump.

1. Weight & Friction: M/T tires feature thick rubber carcass construction and high rolling resistance. On pavement, they force your engine to work constantly just to keep the wheel rotating.
2. The Smart Trade: Switching to a quality All-Terrain (A/T) or Highway-Terrain (H/T) tire reduces rolling resistance. Customers who switch back to standard tread patterns routinely report gaining 1 to 2 MPG back immediately.
3. Keep Pressures Set Cold: Heavy-duty tires lose roughly 1 PSI for every 10-degree drop in local temperature. Running 10 PSI low drags down fuel efficiency and destroys tread life.

3. Stop Prolonged Idle Time

It’s an old habit among truck owners to leave a diesel idling while grabbing coffee, running into the hardware store, or letting the cab cool down. While older mechanical diesels needed prolonged warm-ups, modern electronic diesels do not.

1. An idling 3/4-ton diesel burns roughly 0.5 to 0.8 gallons of fuel per hour while making zero miles of progress.
2. DPF Regeneration Cycles: Long idling sessions create incomplete combustion, which quickly loads up your Diesel Particulate Filter (DPF) with soot. When the truck detects a clogged DPF, it initiates a "regen" cycle—injecting extra raw fuel directly into the exhaust stream to burn off the soot. Excess idling literally causes your truck to burn fuel just to clean itself.

4. Replace Fuel Filters Every 10,000–12,000 Miles

Modern high-pressure common-rail (HPCR) fuel systems operate at upwards of 30,000 PSI. The tolerance inside those fuel injectors is measured in microns.

When your primary or secondary fuel filter begins to clog with debris or moisture, fuel pressure drops, disrupting the ultra-fine atomization spray pattern inside the cylinder.

1. The Result: Partial combustion, lost horsepower, and wasted fuel.
2. Tech Tip: Change both upper and lower fuel filters every other oil change (or roughly every 10,000 miles). Don't skip using a quality winterization/anti-gel fuel additive during cold Nebraska months to boost cetane and keep injectors lubricated.

5. Clear Out the Bed Scale & Extra Weight

It's easy to treat a truck bed like a mobile storage shed. Leaving 300 lbs of rusty spare parts, heavy iron hitches, sandbags from last winter, and unused tools lying in the bed adds constant drag.

Every extra 100 lbs forces the engine to burn marginally more fuel during stop-and-go driving. Taking 15 minutes this weekend to unload unnecessary gear out of the bed is the easiest, zero-cost fuel upgrade you can do.

Thinking About Upgrading to a Newer, More Efficient Work Rig?

If your current heavy-duty truck is getting older and costing you more in maintenance and fuel than it's worth, it might be time to look at newer option years. Advances in 8-speed and 10-speed automatic transmissions in recent years allow modern gas and diesel V8s to cruise at much lower RPMs at highway speeds.

Stop by Tailgate Motor Co. on 23rd Street in Fremont. We take trade-ins, offer straightforward pricing, and have a wide selection of inspected pre-owned trucks ready to work.