We have some threads that discuss oil drain plugs & washers.
Top_Fuel replaced his drain plug with a magnetic plug and bought a pack of washers.
Dripping Oil Drain Plug Fixed
He has a good write-up with part numbers and other details.
Originally Posted by Top_Fuel
Does anyone have a list of part numbers for all the various washers? It would be good to have that list in one easy-to-find place.
Alex1a1f has done away with the drain plug & washer setup and uses a Fumoto oil drain valve.
Fumoto Oil Drain Valve Specs
Again, we have another good, detailed post with a discussion on the merits of these valves.
Originally Posted by Alex1a1f
I put on a Fumoto oil drain valve and expect that I won't have to worry about the washer - though I don't do a lot of oil changes. My favorite aspect of this valve is I am able to attach a section of hose to route the drain into an old oil bottle with no mess. This also makes it easy to collect a sample for analysis.
View my fuel log 2015 Mirage ES 1.2 manual: 50.1 mpg (US) ... 21.3 km/L ... 4.7 L/100 km ... 60.2 mpg (Imp)