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Why VR-1 as a flush oil?
I've seen it recommended here that Valvoline VR-1 be used as a flush oil when changing from Mobil1 to Castrol. Why VR-1 in particular? Any reason why a jug of Motomaster NuGold or any other non-synthetic wouldn't work just as well?
I ask because VR-1 is hard to get and not cheap around here. Don't really want to use fifty bucks worth of oil to do a ten minute flush.
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'99 black 986
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