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Dear Vladimir,
May this find you well. Safe disposal of used automotive working fluids requires that they not be contaminated, i.e., mixed with anything else (water, gasoline, etc.).
Coolant: some Wal-Marts will take used coolant or motor oil, if in containers for those products (i.e., not in plastic milk containers, some of which do not have screw-type caps). I also returned used Volvo coolant to the dealer, where I bought coolant.
Transmission Fluid: Some transmission shops will take used fluid that is "clean", i.e., not contaminated with water or gasoline. Fluid dirty from use should be accepted. A little water in ATF is not a problem: it floats to the top. Gasoline in ATF is hugely dangerous.
Brake fluid: some auto stores - if they have a repair center - can recycle brake fluid.
Gear oil: recycle the same as motor oil.
Lead/Acid Batteries: Sears automotive centers takes used batteries. Some Wal-Marts will take a used battery. Indeed, at some stores, if you buy a car battery, there's a "core charge", rebated when you turn-in the replaced battery.
Some municipalities may have re-cycling centers - usually at a landfill - where oil, coolant, etc., is collected, put into drums, and sent for re-processing.
I'm no chemist, so cannot say if brake fluid contaminates used oil. However, coolant surely contaminates used oil, ATF, or gasoline, and so should be re-cycled separately.
Hope this helps.
Yours faithfully,
spook
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