Category: Blog – Diesel Engine News & Updates

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History of Vehicle Emissions Regulations: From Smog Controls to Modern Diesel Standards

EPA diesel emissions standards timeline chart showing major regulations from 1970 to 2027 including Clean Air Act, ULSD, Tier 4, and NOx rules

Vehicle emissions regulations did not happen all at once.

They developed over decades as engineers, regulators, and manufacturers responded to air quality problems caused by hydrocarbons, carbon monoxide, nitrogen oxides, particulate matter, and later greenhouse gas emissions.

For diesel engines, the biggest changes came when regulations began focusing more heavily on particulate matter, NOx, fuel sulfur levels, and aftertreatment systems.

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Highway & Heavy Parts Answers Your Diesel Engine Questions: Turbochargers

Here at Highway & Heavy Parts, we sell a lot of turbochargers. We carry a number of the industry’s leading brands for all major OEMs, and have helped diagnose a lot of our customers’ turbo failures. We provide solutions to help get them back on the road.

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What’s New at Highway and Heavy Parts

At Highway and Heavy Parts, we’re always working to improve how we support diesel repair shops and equipment owners. While our commitment to quality parts, fast shipping, and real technical support hasn’t changed, we’ve added new tools, products, and ways to stay connected.

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Meet the Experts at HHP: Andy Thompson

We spend a lot of time talking about diesel engine parts – but today, we want to shift the focus to something just as important: the people behind it all.

If you’ve ever called in, asked a question, or needed help finding the right part, chances are you’ve already experienced what makes our team different. This is your chance to get to know one of those people a little better.

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Best Apps for Truck Drivers in 2026 (Navigation, Fuel, Weather & More)

Modern trucking depends on more than just the truck itself.

Mobile applications now play a critical role in:

  • Route planning
  • Fuel cost management
  • Compliance and documentation
  • Weather awareness
  • Load sourcing

👉 The right trucking apps help reduce downtime, improve efficiency, and support safer decision-making on the road.

Below is a breakdown of widely used trucking apps in 2026, organized by function.

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Most Popular Diesel Engine Parts of 2026

These are some of the most in-demand diesel engine components in 2026.

Each product below is selected based on:

  • High application demand
  • Proven reliability
  • Common rebuild and repair needs
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2026 Truck Shows Across the U.S. (Diesel & Semi-Truck Focus)

Truck shows are more than just polished builds and chrome.

For diesel repair shops, owner-operators, fleets, and vendors, the right event is an opportunity to:

  • See new parts and equipment
  • Connect with suppliers and manufacturers
  • Learn what’s trending in the industry
  • Get a closer look at real working trucks and show builds

If you’re planning your 2026 calendar, here are some of the most relevant diesel and semi-truck-focused shows across the United States, organized by month.

👉 Always confirm dates and registration details on official event websites before traveling – many events fill quickly or update schedules.

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How Diesel Engines Keep America Running

You’ve probably heard the phrase – America runs on diesel.

And it’s true.

Diesel engines power the trucks that move freight across the country, the equipment that builds infrastructure, and the machines that keep industries operating every day.

But here’s the part that doesn’t get talked about enough:

👉 What happens when those diesel engines don’t perform the way they should?

Because when a diesel engine goes down, it’s not just one machine: it can slow down an entire operation.

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Diesel Prices in 2025

If you operate trucks, equipment, or a diesel shop, you don’t need anyone to tell you that parts, labor, and fuel are some of your biggest expenses. With fuel, a few cents up or down on a gallon of diesel can make or break margins on a lane, a job, or even a whole month.

In this post, we’ll walk through how diesel prices have moved over the last 25 years, then zoom in on what’s happening with diesel fuel right now in 2025 – prices, fuel quality, and what could be coming next.

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