Now knocking is a forgotten sound



Now knocking is a forgotten sound

-and one reason why is this ‘engine x-ray’

EVERY time you fill up with BP Super-Plus, you know you can forget all about knocking. You know you’ll get top performance in every way . . . the best your car can give . . . first-time starting . . . quicker acceleration . . . clean, troublefree running. The reason? BP Premium Petrols (BP SuperPlus and BP Super) are the most tested petrols in the world.

It’s pace-setting technical research that underlies the outstanding qualities of BP Premium Petrols. At Sunbury-onThames BP operates a remarkable Research Centre where scientists and technicians in many fields pool their efforts to ensure that BP Premium Petrols will give today’s motorist better performance than he’s ever known before.

If you’d like to know more about the technical reasons why BP Premium Petrols always give magnificent performance, send for the FREE Booklet “Behind Every Pint of BP Petrols “. Fill in and post the coupon alongside today.


An engineer studies what is occurring in a test engine by means of a cathode ray tube (similar to the tube of a TV set). This amazing apparatus shows just what is happening in the combustion chamber . . . and is used by BP scientists to ensure that BP Premium Petrols will virtually eliminate knocking.