with remote mount Oil Coolers NEVER have a complete oil change UNLESS
the owner has mounted a valve in the OC line to allow such.

There is/was one guy here that cracked open one of his Oil Cooler lines
(At the bottom of the OC) every time he changed his oil.
[I can't remember if he reported "Cleaner Looking " sump oil or not]

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'84 300SD sold
124.128