The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

PAGE 9-SUPPLEMENT TO THE McHENRY PLAINDEALER., OCT. 11, 1974 AUTO FACTS BRAKE FLUIP Like 1MB HUMAN Bcm, 5OUR CAR NE6PS ITS LIFEGiVlNG auiPS.ONt OF TME MOST IMPORT­ ANT OF THESE IS BRAKE FLUID. IN6 ENERGY OF VOtIR FOOT TV THE WHEELS. CHECK YOUR BRAKE FLUIP RESERVOIR REGULARLY ANP BE SURE ONLY HIGH QUALITY APPROVED FLUID l£ ADDED. IF FREQUENT ADDITION OF FLUID IS NECES­ SARY, FIND AND FIX TME LEAK. BRAKING SYSTEM FAILURES ARE USUALLY DUE TO LOSS Of BRAKE FLUID. Plugs Need Change Every 10,000 Miles A spark plug may look good to the casual observer after 15,000, 20,000 or even 30,000 miles. So why change plugs after 10,000 miles of use in your family car? There's a good reason according to experts. The 10,000 mile change recom­ mendation is not actually based on the fact that spark plugs are "worn out" in the strictest sense after 10,000 miles of service. This figure -- selected after extensive spark plug life tests -- merely repre­ sents a safety factor be­ yond which plugs may misfire under the sudden demands of peak acceler­ ation or extremely heavy load. Gas Economy Drops It also represents the point at which gas econ­ omy begins to drop. In addition, the car is harder to start, power is lost in passing. A spark plug is con­ sidered worn out when it reaches the point where it is likely to misfire -- re­ gardless of its appearance. And, contrary to popular opinion, misfiring doesn't necessarily mean the plug didn't create a spark. It means simply that the plug failed to ignite the gasoline properly--wheth­ er a spark was produced or not! A new spark plug with the correct gap setting needs about 5,000 volts to fire. However, as the plug remains in service, con­ stant heat and chemical attack plus electrical ero­ sion cause the gap to be­ come wider, thus increas­ ing the amount of voltage to fire the plug. Gap Gels Wider Spark plug gap growth occurs at a rate of about 001 inch for each 1,000 miles of driving. Conse­ quently, a set of plugs that has been in service for 10,000 miles generally will have gaps that are about .010 inch wider than the original settings and higher voltage is needed to make them spark. And, this is only for normal driving. Operating the engine at very high speed can decrease the amount of coil voltage available to fire the spark plugs by 30 to 40 percent! Accelerating to pass on a highway may practically double the voltage burden on the spark plug. That's why misfiring is first noticed while accel­ erating because it's here that the plugs actually can require more voltage to produce a spark than the ignition system is ca­ pable of producing -- es­ pecially if the plugs are badly worn. Remember, as plugs re­ main in service, more volt­ age is needed to make them spark. As the ignition system ages, its ability to produce high voltage lessens. If the point is reached where the spark plugs require more voltage to spark than the system can produce, the spark olugs misfire. Our Speciality: AUTOMATIC TRAIMS MISSIONS Complete Automotive Repaiis • Complete Brake Work • Exhaust Installations • Qualified Tune-Ups • Automotive Electrical Repairs Ph. 385-9834 927 N. Front - Mo Henry Su Front Drive Subaru Has Lowered New Cor Prices Up To '400°° The gas stingy Subaru. Subaru owners say they get over 27 miles to the gallon. And that'3 yet another good reason to test drive a Subaru today. llRELLI RADIAL TIRES EUR0PA MOTORS 2414 W. Route 120 - McHenry, III. 815-385-0700 For 24 Hour A Day Information On Subaru Call 385-0725 S EE | See it | | before you buy j 1 any big car. | 1975 DODGE MONACO OLSON'S AN ELEGANT EXPRESSION OF AUTOMOTIVE ENGINEERING. 1975 Dodge Monaco . . . lots of beauty, lots of comfort, lots of car. Offering you all the comfort you deserve. MONACO WAS NEVER MORE BEAUTIFUL THAN NOW. (&UIVIV YSIDE DODGE I v-\r OPEN: Daily 9-9 Saturday 9-6 Sunday 10-5 | 1 4810 W. ROUTE 120 815/^85-7220 McHENRY | *