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PAGE 34 â€" WATERLOO CHRONICLE, WEDNESDAY APRIL 12, y Your Yearâ€"Round Bike Store Braun,s Service to All Makes of Sicycles â€"â€"BICYCLEâ€" J27 Scott St., Kitchener Raleigh Summity Men‘s, Biue 199.95 15 Raleigh Summit Ladies. Biue 199.95 15 27‘ WHEEL ADULT ROAD veio Sport Cavaher Men s Slue 199.95 1. C C M Cavaher Lacies Lgnt Slue 199.95 1. Sexine MRâ€"100 Men‘s Blacx 229.95 15 SALE ENDS APRIL 29/89 or as supplies last Leager 10750 Mountain bike, Boy‘s, Red/White. White, Black Leader 10751 Mountain bike. Girt‘s, Pink 26"" WHEEL ADULT MTN. 24" WHEEL Norco Rainbow Rider Girt‘s. Foot Srake. Blue, Pinx Things began to change with the advent of environmental awareness during the early ‘70s. The muscle car market all but died in 1973 during the OPEC crisis and completely new vehicle market began to develop. Perhaps we should first consider some backâ€" ground facts. By adding lead to gasoline the oil industry achieved two objectives: 1. They raised the octane rating to the needed level effectively and at relatively little expense. High octane gasolines were the diet required to feed the popular and proliferating muscle cars of the 1950s and ‘60s. 2. As a side effect, the lead content residue after combustion formed a protective coating â€" somewhat like Teflon â€" on valves and valve seats, especially the exhaust valves and seats. Because of this helpful coating there was no need for expensive alloys for the manufacture of valves and seats. I received the following note from a reader: I have some concern regarding the phasing out of leaded gasolines two years from now. I have two boat motors and three tractors that require leaded gas. I recently read a report by a consumer group which stated that if unleaded fuel is used in engines meant for leaded fuel, within six months the engine would probably have to be overhauled. I wonder if it would be possible for you to address my concern in one of your future columns. ANSWERS: Leaded or nonâ€"leaded gas SINCE 1925 Mon â€"Tues. 9â€"5:30, (Closed Wednesdays), Thurs. & Fri. 9â€"9, Sat. 9â€"5 (across from Kitchener Farmers‘ Mérfiét)j 149.95 149.95 579â€"BIKE .« 139.99 139.99 159.99 159.99 159.99 169.99 169.99 109.99 119.99 119.99 A corrective action would essentially entail a valve job. All valves would have to be replaced with special alloy or sodiumâ€"filled valves and a set of hardened valve seats would have to be machined into the existing valve seat openings in the cylinder heads. That brings me to the question of what the problems would be if one used unleaded gasoline in an engine designed for leaded fuel. The engine would suffer gradual loss of comâ€" pression due to burning of exhaust valves and seats â€" probably within 5,000â€"7,000 miles of normal use. A sustained heavy strain on the engine would likely accelerate the process. Most of my readers will recall the general scramble of car manufacturers to come up with compact cars and, at the same time, to modify all exisiting car and truck engines to accept unleaded fuel and to comply with the new environmental regulations. Very few car and truck engines produced after 1973 were offered to the public with a warning to use leaded gasoline ONLY. The vast majority of vehicle manufacturers resorted to alloy valves and seats to digest the unleaded fuel without problems. All of the above bicycles come in a box and require some assembly. 30 Day parts warranty included. Lifetime warranty on the frames. LIMITED QUANTITIES NO LAYAWAYS These saie prices do not apply to previously purchased merchandise WE*" c «s ety Thne wourseROGER BRAUN Charles Plhak On The Road Sales Manager "For approved credit cusiomers only. This offer may not be combined with any other Lennox promotion. Enjoy the comfort of Lennox Quality air conditioning and heating products NOW and don‘t pay until Labour Day. See your participating Lennox Dealer to get the details on how you can take advantage of this easy method o to enjoy a Lifetime of Comfort with 100% Quality installation and selected FINANCING Quality products in your home. NO MONE Offer expires May 15, 1989. WE CreativeBaskets o unga ,; GIFT SHOP c Zaaks Fashion Eyewear 11 Erb St. East Come in and see our beauft.iful picnic baskets. Let us create the perfect gift for you. ‘‘We‘re more than just great baslgtus"' P.S. Remember Secretaries Day Apr. 26 Hours: Mon., Tues., Wed., Thurs. 10:30â€"5:30 Fri. 10:30â€"8:00, Sat. 10â€"3:00 "FASHION, QUALITY AND SERVICE" Aecking TFor a Wedding Gif? LGome in and csee our new opnring Cotlection!" or phone for your appointment _ 746â€"4811 ___ Eye examinations arranged DELTA AIR SYSTEMS Waterloo 885â€"2740 181 PARK ST., WATERLOO (between Union and John Streets) Free 2 hour parking in Regina Street lot. 742â€"1171