What Happens If You Put Diesel in a Gas Car? (And What to Do Now)
Put diesel in a gas car by mistake? Here's what actually happens to the engine, the warning signs to watch for, and the right steps to take before you turn the key.
Maintenance
Oil, fuel filters, coolant, glow plugs — keeping a diesel healthy between shop visits
24 articles
Is Diesel Flammable? What Every Diesel Owner Should Know
Diesel doesn't ignite like gasoline, but it's not harmless. Learn why diesel is classified as combustible, not flammable, what flash point and autoignition temperature actually mean, and how to handle and store diesel fuel safely around your truck, RV, or equipment.
6.7 Powerstroke Fuel Filter Service Guide: Intervals & Costs
Learn the OEM fuel filter interval for the 6.7 Powerstroke, how the water separator protects your CP4 pump, and step-by-step service tips. Includes 2026 pricing and a DIY-vs-shop checklist.
Does a Diesel Engine Have a Spark Plug? (No — Here's What It Uses Instead)
Diesel engines don't use spark plugs — they rely on compression ignition. Learn how diesels actually start fuel burning, what glow plugs really do, and when to replace them.
Diesel Fuel Explained: Cetane, Gelling and Storage Life
Diesel fuel isn't one simple liquid — cetane rating, temperature, and age all change how it burns and how long it lasts. Learn what cetane number really measures, why diesel gels in cold weather, how to prevent it, and how long you can safely store fuel before it breaks down.
Diesel Engine Families Explained: Power Stroke, Cummins & 3.0 Duramax
Ford Power Stroke, Ram Cummins, and GM Duramax — including the light-duty 3.0 Duramax — each follow different service intervals and wear patterns. Here's what sets them apart and how to keep each one running right.
Explore Other Topics
Diagnostics & Repair
Injectors, turbos, fuel systems and what those trouble codes actually mean
Emissions & DPF
DPF regens, DEF, EGR and SCR — how the emissions system works and fails
Fleet
PM schedules, DOT inspections and keeping work trucks on the road
RV & Ag
Motorhomes, tractors and farm diesel — service that comes to the field
Buying & Ownership
Power Stroke vs Cummins vs Duramax, used-truck checks and ownership costs
Cost Guides
What common diesel repairs cost and how to compare quotes
State Regulations
Emissions testing, delete laws and inspection rules by state