It's a mixed bag.  If you are certain that your air induction system is in
top condition with NO leaks, especially through small cracks in the intake
boot, I would be OK with an oil and filter change every 7500 miles.  I
would also inspect the air filter at this time and replace it if dirty (use
good judgement here).  I do not see any advantage to changing oil filters
between oil changes if above is followed.

This is assuming an engine in excellent mechanical condition - no
significant oil consumption, no oil dilution from running rich, regular
maintenance history.  If an air leak is discovered or any other malfunction
that could contaminate the oil I would change oil and filter immediately
and correct problem.

Bill
83.5 Westy

At 01:28 AM 6/16/99 EDT, you wrote:
>How often do you change oil?  I've heard of changing the filter
>at 5K and the oil and filter at 10K.  What do you think?
>