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announces the first ash-free multi-grade motor oil EY This great advance can mean better mileage and longer engine life for every car on the road Now Shell Research brings you the most important advance in motor oil in 7 years. It is a combination of unique non-metallic non-ash additives that leave absolutely no metallic residue in the combustion chamber. It is available only in new Shell X-100 Premium motor-oil. With this new motor oil you will have a cleaner, better working engine, and more miles per gallon, whether your car is new or old. Two years of laboratory testing and millions of miles of road testing prove that this new motor oil can provide every driver with these five important motoring benefits. BETTER MILEAGE~--New Shell X-100 Premium is the only multi-grade motor oil that will leave no metallic ash deposits. Your engiae will run more smoothly and give you better gasoline mileage. LONGER ENGINE LIFE--New Shell X-100 Premium will give your engine greatly improved protection against rust, a major cause of engine wear. d Moror oO! spe CLEANER ENGINE~--New Shell X-100 Premium will keep your engine unbelievably clean whether you drive mainly at highway speeds or in stop and start city trathc. REGAINED POWER---New Shell X-100 Premium will recover power normally lost through combustion chamber deposits. 1f you drive a small car this is especially important, COMPLETE ENGINE PROTECTION New: Shell X-100 Pre- mium will effectively protect your car's engine when it is extremely hot , . . when it is stone cold at starting . . . and at every temperature in between, Next time you have your oil changed...make sure you change it to new Shell X-100 Premium available now at all Shell dealers. -- the only ash-free multi-grade motor oil...