§ Mr. Skeetasked 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. ChalkerI 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.