The 4 State Trucks Blog

Kenworths: Never Satisfied & Devilish Ways When you talk about Midwest trucking, heavy hauling, and custom show trucks, the name J&L Contracting stands out. Based in Springfield, Missouri, this family-operated company has built a reputation not only for moving oversized loads across America but also for creating some of the most recognized trucks on the show circuit. Two of the best-known Kenworths associated with the business are Never Satisfied, a legendary heavy haul show truck, and D …

How a Semi Truck Exhaust System Works A heavy-duty exhaust system has three main jobs: route burned gases safely away from the engine and cab, control combustion noise, and maintain proper exhaust flow. On a basic system, exhaust moves from the manifold or turbo outlet through connectors, pipes, flex sections, elbows, mufflers or aftertreatment equipment, and finally through the stack or tailpipe. Those parts also have to survive engine movement, chassis vibration, road shock, heat expansion, mo …

Semi truck engines can last up to one million miles, or more, before they need to be rebuilt or replaced.  During their lifespan, engine system parts experience a lot of heat and pressure, eventually wearing down and hindering the engine's performance. This is precisely why preventative maintenance is so important, especially on older trucks without an ECM (electronic engine management system). Here’s the low down on how to maintain your diesel truck engine parts for years to come, so …

If you want to keep your diesel engine from overheating you need a well-functioning replacement Peterbilt radiator to properly carry the hot coolant through small passages, transfer engine heat into the air, and return cooled fluid to the engine. 7 Factors to Consider Before Buying a Peterbilt Radiator Correct Fitment Cooling Capacity Core Construction Airflow/Core Design Durability Serviceability Price Peterbilt 379 Radiator Fitment Identification Application Main Identifying Features …

Small aftermarket semi truck accessories and performance upgrades save more money over time than their upfront price suggests. Here are 10 things that lead to cost-per-mile savings. Trucking in 2026: The Financial Reality The cost of everything has gone up, and that includes operating a truck. The average cost per mile of running a truck is $2.26 per mile. Non-fuel costs are an average of $1.854 per mile. Let’s say you drive 100,000 miles a year. That’s $226,000 dollars (on the …