What happens if you don't refuel with petrol for a long time in a dual-fuel (Petrol-CNG) vehicle?

If your vehicle runs on both CNG and petrol but you have been driving it solely on CNG for an extended period, doing so could be risky. Here is why.

Many people today use dual-fuel vehicles (CNG and petrol), but have you ever wondered what happens if you don't put petrol in a CNG-compatible car for a long time? Is this normal, or could it lead to problems?

If a driver operates a dual-fuel vehicle exclusively on CNG without refilling the petrol, critical components of the car could be damaged. You might face difficulties starting the vehicle and incur repair costs. Several other issues could also arise.

What are the consequences of not refilling petrol?

The presence of petrol helps keep the car's fuel pump cool. Conversely, if the tank has very little petrol or is empty, the pump can overheat. Prolonged exposure to this condition increases the risk of pump failure. Furthermore, if you drive on CNG for an extended period without using petrol, the petrol injectors remain idle and accumulate deposits (dirt/gunk), which can disrupt the petrol supply.

Difficulty starting the vehicle

If the petrol in the tank has aged and deposits have accumulated in the injectors due to prolonged disuse, you may face trouble starting the car in petrol mode. Additionally, if the engine does not function correctly, the vehicle might jerk or stutter. Therefore, using petrol occasionally is essential.

Keep these key points in mind.

If your vehicle runs on both petrol and CNG, never leave the petrol tank empty. It is advisable to keep at least 25 percent petrol in the tank. Additionally, make sure to use the vehicle in petrol mode occasionally during the week. However, it is essential to read and prioritize the instructions provided in your car's manual to avoid any vehicle-related issues.