In the Philippines, sudden downpours, monsoon surges, and typhoons can bring heavy rain and flooding at different times of the year. For motorists, this creates a recurring but often overlooked risk: water entering the fuel tank, potentially contaminating the fuel and gradually affecting engine performance.
To help drivers stay ahead of potential problems, Caltex Philippines is sharing a quick checklist to help protect vehicles from water contamination whenever wet weather and flooding occur.
How to Keep Water Out of Your Fuel Tank During the Rainy Season
A few simple precautions can help motorists minimize the risk of water getting into their vehicle’s fuel system:
- Inspect your fuel cap. Check for cracks or signs of wear and make sure the cap is securely closed after every refueling.
- Keep the fuel filler area clean. Clear away dirt, leaves, and other debris around the fuel filler so rainwater can drain properly instead of pooling near the cap.
- Park under cover when possible. During heavy rain or flooding, park your vehicle in a covered area. It is also advisable to hold off on refueling immediately after heavy downpours, particularly in flood-prone areas, as rainwater can potentially seep into a station’s fuel storage and dispensing equipment.
- Keep your tank reasonably full. Maintaining a reasonably full tank reduces the amount of air space inside and can help minimize condensation forming within the tank.
- Know your vehicle’s specific requirements. If you regularly drive through flood-prone areas, consult your vehicle manufacturer or a trusted mechanic for additional precautions suited to your vehicle.
Fuel quality is also an important part of maintaining engine performance. Caltex fuels contain Techron, an active cleaning ingredient designed to remove existing deposits and help prevent new ones from forming, supporting a cleaner engine and reliable performance even in wet conditions.
Signs Water May Have Already Gotten Into Your Tank
Even with proper precautions, motorists should know the warning signs that could indicate water has entered the fuel system.
Water contamination may manifest through:
- A shaky or rough-feeling drive, particularly at lower speeds
- Difficulty starting the engine, or the vehicle stalling shortly after starting
- Sluggish or less responsive performance, even when driving on flat roads
- Rougher-than-usual exhaust and unusual engine noises, particularly after driving through heavy rain or wet conditions
If several of these symptoms appear together—especially after driving through heavy rain or flooding—it is best to have the fuel system checked by a mechanic before continuing to drive.
Identifying water contamination early can help prevent potentially more costly damage to the engine down the road.
“Rainy season driving can put extra strain on a vehicle’s fuel system, and it’s something a lot of motorists don’t think about until it becomes a problem,” said Caltex Philippines General Manager and Country Chairman Pongtorn “Bon” Tangmanuswong.
“Our fuels are engineered to protect engines from deposit buildup, with strict quality controls ensuring water-free fuel. Our station teams are all ready to help with maintenance checks or any emergencies so drivers can enjoy their journey, rain or shine.”
As part of their rainy-season maintenance routine, motorists can drop by any Caltex station with autoPro for a fuel cap and filler check, helping ensure their vehicles are better prepared for wet-weather driving.
