I'll reply even though I don't use the green filter.
Yes it will fit, they are the same since the Forester came out.
I'm not sold on the wash and spray routine, I'd still think the filter's breathing could be compromised somewhat. I change my air filter in the spring and fall each year as part of regular maintanice, it's an aftermarket paper that's 12-14 $'s Canadian, so that makes it 7-8 $'s US.
Same with the K&N, how much oil is too much and how much is too little.