HC Deb 24 May 1982 vol 24 c242W
Mr. Skeet

asked the Secretary of State for Energy what is the mileage per gallon for averaged-sized cars in unleaded vehicles; and how this compares with the performance of such vehicles using leaded petrol.

Mrs. Chalker

I have been asked to reply.

An average size car with a 1600 cc high compression engine using leaded high octane fuel will do about 32 miles to the gallon. A similar car with a low compression engine of similar performance and designed to run on unleaded low octane fuel will do about 30 miles to the gallon, an increase in fuel consumption of about 6 per cent.

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