Takes about a 32mm socket, check before you buy, or go to Moss Motors or Minimania for the tool. Spin off oil filter after putting towels under it to catch runoff, use a metric hex tool to remove drain plug. No more difficult than any other car. Be sure to oil the filter o-ring and to put back drain plug and fill with correct amount of oil before starting 5/30W synthetic.
Charlie Croker ,BRG 03 Cooper S, SCCA Solo, PDX, Time Trials, RoadRally, and Stella,
011 Oxford Grn Countryman S