1.   Independent tests have proved that Shell Advanced petrol will keep your engine three hundred percent cleaner than ordinary fuels.

2.   He told his driver to wait outside and keep the engine ticking over.

3.   As the presumptive head of the Republican ticket, he has an obligation to his supporters and the GOP faithful to keep the engine fueled, he explained.

4.   But they need gas in the tank to keep their engines running.

5.   It is designed to keep the engine at the proper operating temperature under all conditions.

6.   Parking lots provide electric warmers to keep car engines from freezing.

7.   Regular grades now have the necessary detergents and additives to keep the engine clean as well.

8.   The crew kept the engines revving to prevent freezing up.

9.   Veteran whale watchers also keep their engines running or make some noise so whales can identify their locations.

10.   We only need enough octane to keep our engines from pinging and no more.