The fewer miles you drive your car each day, the more frequently you should change your oil! Spin On Oil Filter, fits all models that take a spin on filter (not the cannister type) including single point injection Minis.
I think it is time to go over passenger car automotive engine oils in detail. I will be writing several articles to be published soon so I will try to get some of it out here. I feel this is a very general topic for all car owners on this board.