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Do Diesel Engines Use More Oil Than Petrol?

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Mine does, it was a brand new Peugeot 207 1.4 HDi and my first deisel car after a lifetime of petrol cars. It uses a lot of oil but in the service booklet it says it should not use more than half a litre of oil for every 1000 miles which seems to me to be a lot of oil compared to petrol cars. I have now done 18000 miles in 11 months and added 2 and a half litres in that time
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Diesel engines, because of their higher compression ratio, are more thermodynamically efficient then petrol (Otto cycle) engines.

So No, diesel engines do not use more oil then petrol.

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