Since most small OPE has fairly short oil change intervals specified, dino oil seems to work just fine... Lots of us use either a DrainZit https://www.homedepot.com/p/10-mm-Oil-Drain-Hose-Extractor-HON1010/206184635?mtc=Shopping-B-F_D28I-G-D28I-28_32_PORTABLE-MULTI-NA-Feed-PLA-NA-NA-SHP&cm_mmc=Shopping-B-F_D28I-G-D28I-28_32_PORTABLE-MULTI-NA-Feed-PLA-NA-NA-SHP-71700000041074945-58700004788398022-92700040946149137&gclid=EAIaIQobChMI573BxIOD5QIVk4rICh1t6g3OEAQYAyABEgJLIvD_BwE&gclsrc=aw.ds or an EZ Oil Drain Valve https://ezoildrainvalve.com/index.html on our OPE. Both work extremely well!I gotta ask, after breaking in with regular SAE 5/30 oil, what are the thoughts on Synthetic Oil. Specifically, Mobile 1 Synthetic. I did allot of research on synthetics in vehicles, and it seems to be a no-brainer. But, smaller engines.. old school (not necessarily the wrong school) says regular. The scientific thinker in me things synthetic. Also, has anyone put a valve on the oil drain hole, thus not needing tools to do oil changes? Thoughts??? Thanks!!