Maintenance

Oil, fuel filters, coolant, glow plugs — keeping a diesel healthy between shop visits

24 articles
Mechanic draining a fuel tank after diesel was accidentally put into a gas engine
8 min read

What Happens When You Put Diesel Into a Gas Engine?

Diesel in a gas engine causes rough running, stalling, or a no-start because gas engines rely on spark ignition that diesel can't support. Here's what actually happens, why it differs from gas-in-diesel mistakes, and what fixing it costs.

Mechanic inspecting a turbocharger on a diesel engine to explain whether you can supercharge a diesel instead
7 min read

Can You Supercharge a Diesel? Turbo vs. Supercharger Explained

Yes, you can bolt a supercharger to a diesel — and some classic engines did it from the factory. But here's why almost every modern diesel uses a turbo instead, what changes if you add forced induction, and what it costs to boost a diesel the right way.

What Happens If You Put Gasoline in a Diesel Engine?
7 min read

What Happens If You Put Gasoline in a Diesel Engine?

Gasoline in a diesel engine is a serious misfuel, not a minor mix-up. It strips lubricity from the fuel system and can wreck the injection pump and injectors in minutes. Here's what actually happens, what it costs to fix, and what to do the moment you realize the mistake.

Mechanic performing a fuel filter diesel change on a heavy-duty truck engine in a repair bay
7 min read

How to Change a Diesel Fuel Filter: A Practical Guide

Learn how to change a diesel fuel filter step by step, including tools, priming the system, OEM service intervals, and the warning signs that mean it's overdue. Includes a cost comparison for DIY versus shop service.

A mechanic working on a truck engine in an indoor mechanical workshop.
6 min read

What Is a Diesel Pusher? RV Engine Type Explained

A diesel pusher is a motorhome with the diesel engine mounted at the rear instead of the front. Learn how it differs from a gas Class A, what it costs to own, and what maintenance it needs to last 500,000+ miles.

A mechanic in a dimly lit garage working on a red semi truck, focus on repair.
7 min read

Can You Supercharge a Diesel? Turbo vs. Supercharger Explained

Yes, a diesel can technically run a supercharger — but almost none do. Learn why turbochargers dominate diesel design, when superchargers were actually used, and what it costs to add forced induction today.

What Is Renewable Diesel? A Plain-English Guide for 2026
7 min read

What Is Renewable Diesel? A Plain-English Guide for 2026

Renewable diesel is a drop-in fuel made from fats, oils, and greases that chemically matches petroleum diesel — unlike biodiesel, it needs no blending and performs better in cold weather. Here's what it is, how it's made, what it costs, and whether your engine can run on it.

A blue Volvo truck parked outside a warehouse in an industrial area, daytime scene.
7 min read

DEF Crystallization: Why It Happens and How to Avoid It

DEF crystallization clogs injectors, sensors, and pumps in your SCR system. Here's why Diesel Exhaust Fluid crystallizes, what it costs to fix, and how regular checks and fresh fluid keep your emissions system running clean.

Preventing Diesel Fuel Gelling in Winter: A Practical Guide
7 min read

Preventing Diesel Fuel Gelling in Winter: A Practical Guide

Diesel gelling shuts down trucks, RVs, and generators when temps drop fast. This guide covers cloud points, winter-blend fuel, additive treat rates, block heaters, and a cold-weather fuel checklist to keep your rig running through the coldest months.