I last changed the engine oil filter in my Mitsubishi 2.8 turbo deisel,
about 2 years ago. Is that pushing it, a bit? I should say it is a 16 year-
old vehicle.

What is the effect of *never* changing the oild filter? Does the filter
eventually clog up, or what?

As for oil changes, there is a slight leak in the rocker box gasket, so the
occasional oil top-ups amount to a complete oil change about every 2 years,
without needing to undo the sump nut - very convenient. ;-)

TIA

Al