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Re: Waste oils
Another good idea would be to figure out some uses for used oil. I've read about used oil being processed and used in the production of certain plastics and other types of lubricants, like the type of grease used for bearings and other moving parts in industrial machinery. If there's a way to do this without creating too much waste or pollution, it's definitely worth looking into reusing engine oil instead of just using fresh crude oil for these purposes if it isn't necessary.
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"Ok, systems check; the battery is discharging, the oil temperature is very high, the oil pressure is very low, the engine temperature is off the end of the scale, I'm running out of petrol... but the clock is correct!"
-James May, in an old, worn out Lamborghini purchased for less than £10,000. 
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