From my research the oil change crush washer is the standard 14mm and the rear diff drain and fill washers are 20mm?

Can I pick these up at a local auto store or should I go to Honda / Acura parts desk to pick them up?

 

most Honda crush washers are aluminum ones. I get them from the local dealer.

 

They are 20mm. A member here 'cbrose' verified this info and sent me a pm. So-thank him for this..

 

 

Anyone else have an issue with aluminum washers seizing up? I bet the dealer over torqued my oil drain bolt.

I couldn't even get it off with a Snap-on cordless impact, I had to use a breaker bar with another pipe to remove that sucker. I couldn't separate the washer from the bolt either so I threw in a spare brass washer. Will probably replace that thing with one of those easy drain plugs.

Feels so much better to do the job yourself and know you did a good job.