The environmental controls have allowed the engines to run several hundred thousand miles with very little trouble. The engines used to get so dirty inside due to all the unburned fuel that they were very short lived. Spark plugs would last a few thousand miles before they became lead fouled. I can remember choking in the city due to all the smog from engines idling. The cars rarely broke 20 mpg, now 30-40 is very common, due to the mileage restrictions.
I live rural, but travel to cities extensively, the impact of pollution is much more dramatic when there is a higher vehicle density, but the effects are global.
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Today's Featured Article - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
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