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Letters

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Why you can trust SCMP

Fatal flaws in fuel efficiency suggestions

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In his letter ('How to save fuel and reduce our petrol outlay', June 23), Tommy Hui, former advisory committee chairman, mechanical engineering, Hong Kong Polytechnic University suggested 'measures we can take to make our costs lower and to use fuel more efficiently in our vehicles'.

His points - on accelerating slowly and smoothly, driving at optimal speed, checking engine conditions and not accelerating or braking too hard - are recommendations one can readily find in all car owners' manuals and are nothing that car owners don't know, except those who do not bother to read the manuals.

Mr Hui suggested filling up petrol tanks at cooler ground temperature, saying that the 'cooler the ground temperature, the denser the petrol' so drivers 'pay less for more'.

This is far too theoretical to be practical.

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Also, Mr Hui seemed to think we can save petrol by pumping slowly.

This is a scenario which is only applicable overseas.

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