What weight oil are you using?
What oil filter are you using?

Good quality oil filters have anti-drain back valves. These prevent the oil from draining back thru the filter when the engine is shut off.

Too heavy a weight oil can also cause valve ticking.


Mitsu # 6 - 98 6G72 Montero Sport, Locking Rear Diff, Aisin Manual Hubs, 31x10.5

Mitsu # 7 - 02 6G74 Montero Limited