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Torque Shop: The case for a tank half empty

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A motorist pumping petrol at Caltex Petrol Service Station at Beach Road on February 16, 2021.

Fill 'er up: Go with a full tank by all means, but stop when the fuel nozzle's auto cut-off kicks in.

ST PHOTO: LIM YAOHUI

Shreejit Changaroth

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A fuel tank filled to the brim will not increase fuel flow to the engine. This is controlled by the injection system, which is mostly determined by your right foot. 

The evaporation theory is also flawed because petrol lost to the atmosphere is insignificant and is not a function of the volume in the tank.

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