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    Shell Rotella T6 5w-40 '02 Audi 2.7t 5500miles

    170,500 miles on the engine in the allroad. Oil was in the car for about 2 months. Air and oil filters - OEM Relatively hard use, lots of trailer pulling with a/c on in 90+ weather, at 80+ mph. I'm moving, so the car was heavily loaded a lot. It has a manual transmission, and I try to...
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    Iron block, aluminum heater/head, brass radiator

    in a 1988 Audi. Cold climate. Is there any way to figure out which coolant to use, or if it even matters? The brass radiator is aftermarket, since the car came with an aluminum radiator. The OEM plastic/aluminum ones had a lot of problems with cracks and leaks. It had good ol' green in it...
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    (long) coolant flush: mud, scale, & black flakes

    Last summer, I changed out the timing belt and associated components in my new-to-me 2002 Audi Allroad with the 2.7 twin turbo motor. I noticed that the coolant, while the proper pink color, was milky. Not oily milky, but more like sediment milky. I didn't really give it another thought. At the...
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