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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - November 8, 1974, Lethbridge, Alberta Friday, November 8, 19.4 iHt LeiHBRIDGe HERALD 5 Going farther for your money How you can improve your car's gas efficiency KEEP SPEED DOWN. Tests conducted with a popular American car have indicated a 25 per cent im- provement in fuel economy when speeds are reduced from 70 to 50 miles per hour. Wind resistance increases as car speed increases, and more energy is thus required to move the car at higher speeds. AVOID "JACK RABBIT" STARTS. Gradual acceleration in city driving can save as much as two miles per gallon compared to rapid acceleration. That's because it takes a lot of ex- tra energy to increase an automobile's acceleration rate. A power valve, located in the carburetor, lets more fuel into the cylinders under full acceleration. In addition, an accelerator pump provides extra fuel to avoid hesitation when the gas pedal is jabbed. KEEP SPEED CONSTANT. Driving at steady speeds helps to save gasoline. Unnecessary acceleration activates the accelerator pump and power valve, thus injecting extra and wasted fuel into the system. ANTICIPATE STOPS. It is best to plan ahead for all possible traffic conditions. This allows for gradual, rather than abrupt, stops and this smooth driving contributes to better fuel 'economy. In addition, gradual braking prolongs the life of brake linings. AVOID ENGINE IDLING. An idling engine wastes energy; it does no useful work while consum- ing fuel. Excessive idling may also shorten engine life if the practice is repeated over a long term period. As a guide, drivers should not idle engines for more than three minutes, if possible. WARM E'NGINE BY DRIVING. Drivers mil ob- tain better economy by driving the car to warm the engine, rather than allow- ing it to idle excessively. This speeds up the warm- ing process, and thus saves gasoline. The driver must remember, however, that a cold engine does not res- pond as quickly, so care must be exercised in all traffic situations where engine response is critical. MINIMIZE THE USE OF AIR CONDITIONERS. Air-conditioning puts a sub- stantial load on automobile engines, and should, therefore, be used only on the hottest days. While driving at 30 miles per hour, for example, use of the air conditioner can result in a fuel economy loss of two miles per gallon. As a rule, use of the air conditioner cuts gas- oline mileage by 10 per cent. MAINTAIN CORRECT TIRE PRESSURE. Under- inflated tires reduce gas- oline mileage slightly. Soft tires also wear out more quickly, and may adversely affect vehicle handling, thus creating a potential safety hazard. Many automobile manufacturers recommend increasing the tire air pressure by approx- imately four pounds before high-speed driving. Tires should not, however, be inflated above the max- imum recommended pressure. KEEP THE ENGINE TUNED UP. Spark plug misfiring may result in a significant increase in fuel consumption. In laboratory tests at speeds of 30 and 50 miles per hour, for ex- ample, spark plugs misfir- ing 10 per cent of the time resulted m an eight per cent increase in fuel con- sumption. In addition, igni- tion timing deviating from the manufacturer's setting resulted in a significant decrease in fuel economy. For example, a 10 degree retard in basic spark tim- ing may result in an average loss of 1.3 miles per gallon at speeds of 30, 50, and 70 miles per hour. Drivers should be remind- ed that these and other ob- stacles to efficient engine performance can be eliminated with a complete tune-up. SERVICE AIR FILTER. A dirty air filter can cause a decrease in fuel economy and a decrease in power output, by restricting the flow of air to the engine. Drivers should therefore be advised to change the air filter at specified inter- vals, or according to the manufacturer's rec- ommendations. In ad- dition, frequent air filter servicing is required if con- siderable driving is done in sandy or dusty conditions. DON'T RIDE THE BRAKES. Even slight foot pressure on the brake pedal can apply the brakes, especially power brakes. This wastes fuel energy which might be used to move the car. It also wears the brakes out faster than normal. KEEP TRANSMISSION IN HIGH GEAR. Keep both automatic and manual transmissions in the highest gear possible. With manual transmission, shift into high gear as soon as you can; with an automatic transmission, use a light foot on the accelerator to encourage the transmis- sion to shift into high gear quickly. These actions will save gasoline. MINIMIZE VEHICLE LOADS. Transporting un- necessary weight in your car will cause it to use more fuel. The difference is not great on level ground, but does show up when climbing a hill and you will probably have to use your brakes more often. Hauling a trailer is even more costly in terms of extra fuel consumption. In this case, not only must the weight of the unit be pulled, but the extra wind resistance of a large, boxy unit must be overcome. A compact car with a V-8 engine, for example, may require twice as much fuel as normal when hauling a medium-size trailer on a typical vacation trip. SERVICE THE MANIFOLD CONTROL VALVE. The manifold heat control valve should be inspected and serviced periodically. This valve, located in the exhaust system of some vehicles, allows exhaust gases to heat the intake manifold during cold engine operation. These gases heat the area under the carburetor to aid in the vaporization of gasoline while the engine is cold. As the engine warms up, a temperature-sensitive spr- ing causes the valve to direct all of the exhaust gases to the exhaust pipe and away from the intake manifold. A valve stuck in the open position causes slow engine warm-up and poor cold-engine perfor- mance. A valve stuck in the closed position will cause a loss of power and hard starting with a hot engine. THESE FIVE MEN ARE ASPLUND Dorsy Owiur-MiniQBr MacNEILL Tim STANLEY Kerry LAWSON Barry 327-8888 3-27-8888 32-7-8888 327-88-88 327-8-8- You can contact any of these men by dialing the number below their pictures and your WARD will be knowing you will never get better quality and workmanship for your money, than at Minute Muffler Installations, corner of 3rd Ave. 4th St. South, Downtown, Lethbridge. ;