1. Gas vs Diesel Truck for RV Towing: What’s Better?

The better option depends on how often and how heavy you tow, but generally:

🚛 Diesel trucks are better for heavy RV towing

• Produce more torque, which is critical for pulling heavy loads and climbing hills
• Better fuel efficiency when towing (often 3–4 MPG better than gas)
• Handle mountains, wind, and long distances more easily

⛽ Gas trucks are better for lighter or occasional towing

• Lower upfront cost
• Cheaper maintenance
• Better for daily driving when not towing

👉 Bottom line:

• Go diesel if you tow heavy RVs frequently or long-distance
• Go with gas if you tow occasionally or have a smaller trailer

Which heavy-duty pickups are ideal for RV towing?

The best trucks for RV towing are 3/4-ton (2500) and 1-ton (3500) pickups, especially diesel models.

🏆 Top options:

• Ford Super Duty (F-250 / F-350 / F-450)
• Ram 2500 / 3500 Heavy Duty
• Chevrolet Silverado 2500HD / 3500HD
• GMC Sierra 2500HD / 3500HD

👉 These trucks are ideal because they offer:

• High towing capacity (often 20,000 – 40,000 lbs)
• Strong frames and suspension
• Diesel engine options for maximum torque

Best choice overall: 1-ton diesel trucks (e.g., F-350, Ram 3500) for large RVs or fifth wheels

2. How do RV sway bars improve towing stability?

RV sway bars (or sway control systems) are designed to reduce the side-to-side movement (sway) of a trailer.

🔧 How they work:

• They add resistance at the hitch connection
• Use tension (friction or spring bars) to keep the trailer aligned
• Help the trailer stay centered behind the tow vehicle

🚨 Why this matters:

Trailer sway can be caused by:

• Crosswinds
• Passing trucks
• Improper weight distribution

Sway control systems stabilize the trailer and prevent fishtailing, making towing safer and easier

👉 Bottom line:
Sway bars significantly improve control, safety, and driver confidence, especially at highway speeds.

3. Truck Tire Pressure When Towing an RV

Proper tire pressure is critical when towing.

📊 Key guidelines:

• Always follow the manufacturer’s recommended PSI (cold pressure)
• Increase pressure within safe limits when carrying heavy loads
• Check tire pressure before every trip

⚠️ Why it matters:

• Underinflated tires can overheat and fail
• Overinflated tires reduce traction and braking ability

👉 Best practice:

• Use Load Range E tires (or higher)
• Adjust pressure based on load and towing conditions

4. Does towing a car behind an RV put miles on it?

🚗 Yes, sometimes, but it depends on how it’s towed:

1. Flat towing (all wheels on the ground)

• The car’s wheels turn
• The odometer may increase depending on the vehicle
• Mechanical components (like transmission/drivetrain) are still moving

2. Tow dolly (front wheels lifted)

• Rear wheels still roll. If the vehicle is FWD, then no miles will be increased, but if it is RWD, it may still add miles (vehicle-dependent)

3. Flatbed towing (fully off the ground)

• No miles added
• No wear on drivetrain

👉 Important note: Flat towing requires proper setup (like neutral gear and braking systems) because the RV must handle the extra weight during stopping