Just changed my oil for the first time (the stealer has changed it the last few times and I'm sick of them overfilling). At any rate, I ordered two new crush washers and put the flat side against the block, figuring the rounder side should sit against the bolt head. Does it really matter? By the looks of the old crush washer, both sides get crushed, so I just want to make sure I'll be ok. Any thoughts? Thanks in advance.