Q: I accidentally put premium gasoline in my car

asked by on

Today I went to put gasoline but accidentally I put some premium gasoline, I remove nozzle after 5 sec from car. As far I know some premium got in to car tank. Will it harm my car engine???

Hi there. Premium will not harm your vehicle’s engine. In fact, premium is a required fuel for many of the luxury vehicles today to maintain performance and operation. Premium fuel has a longer burn time which results in fewer deposits left over from the burn; the regular grade has a fast burn time and is known to leave deposits from incomplete burns.

A longer burn time can aid in the prevention of a buildup in what is known in the automotive technology world as a "quench zone". As deposits build up in this zone they actually absorb fuel and additional deposits; if you’ve ever heard an older car continue to run after it’s been shut off this is what causes it to do that. If your car is designed to run on regular, then premium will not cause any problems. However, if your car requires premium, then regular can create drivability symptoms and a possible check engine light. I hope this information helps you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I accidentally put premium gasoline in my car

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car hesitates and jerks

The fault codes and engine operating/sensor information need to be looked at to see if there are any underlying issues. Fuel pressure and volume should be checked along with the induction system to make sure are no vacuum leaks present...

Q: Car only start when cold but dies once warm and wont start till complete cold

You may have more than one issue going on here for your 1987 Toyota Celica. The cold starting issue could possibly be caused by a failing fuel pump or even a temperature sensor. Heat increases resistance in electrical circuits, and...

Q: Car hesitates and jerks at low speeds

Hi there. There are some common issues that can cause this. I usually start by checking to see if the car needs a tune up. Worn out spark plugs can cause this. I usually also check the air filter and...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.