Tire size has a great bearing on mileage. Ever wonder why a lot of late model cars have 19-20-21-22" tires. On most, the circumference and diameter of the tire is close to that of a 15" tire. Some may be bigger, but they are lighter. The idea is to cut down the tire size from the rim to the pavement. This is to save weight--tire is heaver then most rims. This is called "unsprung weight" As far as gasoline octane boost, they do what they advertise to do. The only problem, that most people overlook, is that an average small container only boost the octane a percentage of a point. Read the bottle! In other words, you could put a gallon of octane boost to 20 galons of 87 and make it 93. Of course this is a guess aquired from my research. I might note that a lot of people carry a lot of unneccary weight in their vehicles this waste fuel in the long run. I use no oil additives in any vehicle I own because the manufacturer says not to.
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Today's Featured Article - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
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