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Thread: Oil Sludge?
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Old 02-16-2011, 02:29 PM   #21
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Join Date: Mar 2008
Location: Canberra, ACT, Australia
Posts: 4,512
My Ride: Ex 325CI owner
Ol is a basestock and additive package. Oil basestock type is split into
Group I, Group II, Group II+, Group III, Group IV, Group V. Use RX with anything up to Group III, not IV and V.
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