My 95 accord all of a sudden leak oil dump out to almost empty. I thought it could've been 4m the oil pan gasket, if that was the case the oil wouldn't drain to empty unless it was the main oil seal.

SOURCE: oil leaks

after a period of driveing you have to get oil pan re tighting some times improper installion can keep it leaking also.

SOURCE: i have a 1989 honda accord dx with a oil pan

they don't use gaskets on oil sumps its sealant glue and yes u will have to reapply it when you put the sump back on, and what do u mean by main seal? do you mean the head gasket?

SOURCE: 94 ranger,replaced rear main seals,replaced

There is supposed to be a washer on the drain plug. It's either plastic or copper. It's either missing or more likely embedded with dirt or grit and won't seal properly. Simply pick up a new one when you do your next oil change and replace it then. Always wipe the oilpan off around the drain and clean the drain plug and washer before you re-install them. Hope this helps.