As Rains Persist, Caltex Offers Motorists Tips to Keep Water Out of Their Fuel Tank

By motoph admin on September 9, 2026

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With sudden downpours, monsoon surges, and typhoons bringing heavy rain and flooding across the country, Caltex Philippines is reminding motorists to take precautions against water contamination in their vehicle’s fuel system. Water entering the fuel tank can contaminate fuel and potentially affect engine performance over time. Drivers are advised to check their fuel cap for cracks or wear, ensure it is properly sealed after refueling, and keep the fuel filler area free from dirt and debris that could cause rainwater to pool around the opening. During severe weather, motorists should also park under cover whenever possible and take extra precautions when refueling in flood-prone areas.

Keeping the fuel tank reasonably full can also help reduce condensation inside the tank, while motorists who frequently travel through flood-prone areas are encouraged to consult their vehicle manufacturer or trusted mechanic for additional precautions. Caltex also highlights the importance of fuel quality, with its fuels containing Techron, an active cleaning ingredient designed to remove existing deposits and help prevent new ones from forming. Motorists should also watch for possible signs of water contamination, including engine shaking, difficulty starting, stalling, sluggish performance, rougher-than-usual exhaust, or unusual engine noises—particularly after driving through heavy rain or flooding. If several symptoms occur together, having the fuel system inspected by a qualified mechanic can help prevent further damage.

How to Keep Water Out of Your Fuel Tank During the Rainy Season

Tip	What Motorists Should Do
Check the fuel cap	Inspect the fuel cap for cracks, damage, or signs of wear, and make sure it is securely closed after every refueling.
Keep the fuel filler area clean	Remove dirt, leaves, and other debris around the fuel filler to prevent rainwater from pooling near the cap.
Avoid refueling during severe weather	Park under cover during heavy rain or flooding. When possible, postpone refueling after heavy downpours, particularly in flood-prone areas.
Keep the tank reasonably full	Maintaining a reasonably full tank reduces the air space inside the tank and can help minimize condensation.
Take extra precautions in flood-prone areas	If you frequently drive through areas prone to flooding, consult your vehicle manufacturer or a trusted mechanic for precautions specific to your vehicle.

“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.” Motorists can also visit any Caltex station with autoPro for a fuel cap and filler check as part of their rainy-season vehicle maintenance routine.