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Diesel fuel smells different to gasoline.

A simple test is to pour a little of the fuel onto your fingers, and rub the fuel between thumb and finger. Diesel fuel will feel oily where gasoline is not oily.

In some countries gasoline may have colour added, so if it's say red/pink it could be gasoline. But in other countries - such as the UK - farmers can buy cheap "agricultural" diesel that is a red colour only for use in tractors and other farm machinery. So you can't rely on the colour unless you know for sure which colours are standard in your country.

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How do you tell the difference between diesel fuel and unleaded gasoline?

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