More and More Miles To The Gallon.

NZ Truth, Issue 1237, 15 August 1929, Page 6

More and More Miles To The Gallon.

Every motorist is interested m economy. That is why Big Tree • Motor. Spirit is a favorite with so : many car owners. But even the economy of Big Tree* may be enhanced if the motorists themselves : understand ail the secret's of: their ' cars. Miles and more miles may be obtained out of every gallon of Motor Spirit if certain rules are observed. Here are a few of them. THE TIMING OF THE IGNITION. An engine, may be running very smoothly and showing first rate power, but, should the spark be a little out of timing, good mileage per gallon of Motor. Spirit must not be expected. Shoud your, car be apparently extravagant ip Motor ~! Spirit consumption it is time to investigate . the timing of the ignition. The engine may have good compression, the carburettor be ' clean, all, that is needed 'being a slightly more advanced setting iof the ignition timing. More economy m Motor Spirit must result from the new setting. ':.; In advancing the ignition do so gradually a little at a time, until a click is h*eard which shows that you have gone . too far. Retard the setting until the click is not .heard. In most engines the distributor body can 'be turned when the lamp has been loosened. Turning to the left or. anti-clock'like advances the setting. Do not make-th'e adjustments' until the engine is warmed up. THE TIMING GHAINv The running ,of a car sometimes-, affects the' timing chain /which is always liable to wearing, and stretching. Retarding will result. . Especially m new cars "the timing of the ignition may be retarded' by* the; slack running of this timing chain*' . Sometimes by accident the chain jumps a tooth on the auxiliary shaft sprocket and deranges the ignition timing entirely. Once the timing chain is adjusted it should not need adjustment for a long time. IF THE CAM SLIPS. It sometimes happens that, m adjusting.the ignition cam on the distributor";, shaft, a secure fastening is not made, and sooner or later the earn slips. This retards the ignition, sometimes to the extent that the car will not run. -i

■ The utmost ' care should \ be taken that the cam is left tight, on its ; sliaft.._ ■'. . '...)'."'' ..V.. \'-j Whenever anything about the dis- . :tributor, or its drive iwears or >be- ' comes loose, ignition goes but of time towards the "late side^ Even if "the operating linkage of a hand-/ controlled, ignition outfit ; becomes disconnected, the distributor tends to move of. itself 1 into its retarded position, and the cause of .the resulting engine shortcomings .finaynot at once be located. 'Few motorists frilly understand the ignition, system 'of . the car — especially the coil, ignition that is' usual on all American cars. '_ ' . . Result is that much Motor Spirit wastage goes on which . might be stopped without any difficulty. ■ LOSS OF POWER. When you cut down the, mixture beyond reasonable limits, you certainly economise on fuel, but lose engine power. When, you keep the ignition timed correctly to the highest point of efficiency, you make a very real saving of fuel, and so far from losing engine power you actually increase it. ; : ; Among a group of motorists recently the point was raised— but who ' cares about saving Motor Spirit? ;-- A car that. does 10,000 miles at 20 miles to the gallon uses 500 gallons of fuel. The difference if petrol cost 6d. a gallon more would be £12/10/-. Since 10,000 miles would be a year's running, the motorist who worries when petrol: goes up 6d. m price cannot">ff6rd: to'run a car at all. If he could, ss; a week would not bother him. This is quite fallacious. A business man does riot care,.about ss. a weefc./biiVif he can make a saving of f>Si a lyveek. m every : o_ne of a-hiin-dred directions, and- increase efficiency at the same time, the money mounts up m the course of a. year.. It runs into thousands of pounds m a very short time; , , It is ail against the habits of the business man to tolerate a'; stealdy drain m five shilling, pieces when he knows that it "exists and 'can be stopped. ■ . - • The saving m Motor Spirit .consumption is the. reason that the experienced motorist and the business man uses' Big Tree -Motor Spirit. Give the right conditions, .correct adjustments to; the car, "Big Tree" is a true economic. It was built for mileage to the gallon an# it lives up to the big mileage it claimsUse Big Tree and note the.differences . ■•.:■.. -'•• !.:-,• ".- • .'■••■■ ■ ".-