When Is the Best Time to Refuel? CPC Reveals Optimal Refueling Timing to Extend Vehicle Lifespan and Protect Your Car — It's Bad to Wait Until the Fuel Light Comes On

Recently, escalating tensions between the U.S. and Iran have caused international oil prices to surge. As a result, many car and motorcycle owners, aiming to save money, often wait for prices to drop or until their fuel tanks are nearly empty before refueling. However, this habit not only saves little money but may also severely damage vehicles. To help drivers extend their vehicle’s lifespan and ensure driving safety, CPC Taiwan has shared its '3 No's and 2 Musts' vehicle protection and fuel-saving tips, teaching the public the best refueling timing and maintenance practices to avoid costly repairs.

The '3 No's' of Refueling: Never Wait Until the Tank Is Empty!

1. 'No' Long-Term Storage (Over 3 Months): Prevent Fuel Oxidation and Clogging

CPC warns against leaving vehicles unused for long periods. Gasoline stored for too long can undergo oxidation, forming insoluble gum-like substances that clog fuel lines. Under normal conditions, gasoline in the tank should not be stored for more than three months. In hotter climates, this storage period should be further shortened.

2. 'No' Unverified Fuel Additives: Avoid Damaging Your Car and Wasting Money

Many car owners purchase commercial fuel additives (e.g., water removers, cleaners), but CPC emphasizes that its gasoline already contains the right type and amount of professional additives at the factory, fully meeting modern engine performance requirements. Avoid treating your car as a test subject by buying suspicious products—this wastes money and risks engine damage.

3. 'No' Refueling Only When the Tank Is Empty: Protect the Fuel Pump and Tank

CPC explains that keeping the fuel tank at a low level for extended periods allows moisture to accumulate on the tank walls, leading to metal corrosion. Additionally, the fuel pump submerged at the bottom of the tank may fail due to lack of cooling and lubrication. In humid regions, never wait until the tank is nearly empty to refuel.

CPC recommends refueling when the fuel gauge drops to one-quarter of the tank.

The '2 Musts' of Vehicle Care: The Best Refueling Time Revealed!

4. 'Must' Perform Regular Vehicle Maintenance: Choose High-Quality Oil to Save Fuel

To save fuel, basic maintenance is essential. CPC explains that engine oil should be high-quality, offer excellent lubrication, and be marketed for fuel efficiency. Combined with regular maintenance, this keeps the engine in optimal working condition.

5. 'Must' Choose the Right Refueling Timing: Refuel Before Nightfall, Not After

So, when is the best time to refuel? CPC debunks myths by recommending: 'Refuel before nightfall rather than waiting until the next morning.' Filling up before returning home each day significantly reduces the amount of moist air drawn into the tank as it cools during nighttime temperature drops. This prevents moisture from condensing and settling at the bottom of the tank, thereby protecting the fuel delivery system.