Satellite, John's probably right. Your engine is just getting loose, hopefully, not too loose in a critical area like a bearing clearance. Have you tried running heavier oil? Again, just a band aid, but you may get some more life out of that motor ( like Castrol 20-50w).
By the way, throwing a HV oil pump on a loose motor will just increase it's consumption of oil.
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[This message has been edited by Gene Chas (edited 06-10-99).]