I would like to stick to a 25 hr oil change regimen, however with the challenges that removing the lower cowl on a 231 by yourself presents, this time frame seems to always stretch closer to the 50 hr mark and a full oil and filter change.
Has anyone experimented with using a fluid extractor device (http://www.griotsgarage.com/product/multi+fluid+extractor.do?code=FROOGLE&gclid=CKWMj4zytMACFWoR7Aod4CAAFQ) through the oil filler tube to drain their oil? Does anyone see why this would not work well with our engines?