I've put petrol into my diesel S-MAX - what should I do? | Ask Honest John

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I've put petrol into my diesel S-MAX - what should I do?

I accidentally put 6.3 litres of petrol into my diesel Ford S-MAX. The car has since been towed home. Should I fill it up with diesel to dilute the petrol, or simply pay a firm to drain it?

Asked on 20 September 2016 by Sarah Skilbeck

Answered by Honest John

I have got away with 10 litres in a 60 litre tank by adding a lubricity additive and using only Shell V-Power Nitro Plus diesel which itself is high lubricity. You must then keep the tank topped up and never let the level get low because the petrol partially 'floats' on the diesel as it gradually absorbs into the diesel.

Tags: diesel engines misfuelling technical issues

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