AT Flush?

No...Changing the fluid every 30 K miles should be sufficient enough. Regards, Viktor.

Yes - todays transmissions are a lot more compact but generate the same amount of heat, so the fluid takes more of a beating. The days of never changing the fluid and expecting to get 100+k miles out of the tranny are gone. If you want to get 200+k miles out of the tranny, change the fluid.

I don't know what Subaru recommends on that one, but 20k miles sounds a little early. Go by the maintenance schedule in your owner's manual and do it 10-15k miles early or follow the severe service schedule if you want to be conservative.

Bill Putney (to reply by e-mail, replace the last letter of the alphabet in my address with "x")