OOPS, I ADDED GASOLINE INSTEAD OF DIESEL
Bryna Christensen • September 4, 2025
WHAT TO DO RIGHT NOW TO PREVENT MAJOR ENGINE DAMAGE
Mixing up fuel happens more often than you think—and it can be a costly mistake if not caught quickly. If you accidentally added gasoline to your diesel vehicle, don’t panic—but do take action fast. Here’s what you need to know and do next.
FIRST THINGS FIRST: DON’T START THE ENGINE
If you realize your mistake before starting the engine, you're in much better shape. Gasoline doesn't have the lubricating properties that diesel fuel does, and starting the engine can allow the gasoline to circulate through your fuel system causing serious damage to fuel lines, pumps, and injectors.
IF YOU ALREADY STARTED IT…
If the engine's been started, pull over as soon as it's safe and shut the vehicle off immediately. The sooner you stop the engine, the better your chances of avoiding severe damage. Tow the vehicle to a trusted shop (like us!) where we can safely drain the system and inspect components.
WHY GASOLINE IN A DIESEL ENGINE IS A BIG DEAL
Diesel engines rely on compression, not spark, and diesel fuel helps lubricate internal parts. When you replace diesel with gasoline:
- It can strip lubrication, leading to wear and tear
- It creates improper combustion, possibly damaging pistons
- It can clog fuel system components, which are not designed to handle gasoline
PRO- TIPS TO PREVENT FUTURE MIX-UPS
Here are a few quick tips to avoid making the same mistake twice:
- Label your gas cap or dashboard with “Diesel Only”
- Double-check the pump handle color and label
- Avoid distractions at the pump (yes, put the phone down!)
WE’VE GOT YOUR BACK
If you’ve accidentally fueled up with the wrong stuff, we’re here to help. Call us right away and we’ll walk you through your next steps—or get you towed in for service. Mistakes happen, but they don’t have to turn into major repairs.
Schedule an appointment online or call us now at 707-443-2122!
*Stay connected with us on social media for updates, tips, and special offers throughout the year. We love hearing from you and are always here to help with any automotive questions or needs you might have.
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