I thought It was federal law that all gas must have 10% ethanol.

Not in Canada.

Will Wet Trace around the injectors show if a DI seal has failed?

I stumbled across a post where someone listed some aftermarket seals for the DI's. I can't for the life of me find the link again. It was from a Japanese company. Anyone had any experience with those seals? Are they any better than the OEM ones?

Anybody got those Japanese seal P/Ns? Some TRD high pressure seals perhaps?

well, my DI seem to be failingat 60k, most likely caused the demise of my last engine. Is anyone aware of a difference between 16611JB010, 16611JB020 and 16611JB030 assembly? They all appear as the part number on the subaru website.

Are you sure you need the whole injector and not just seals? DI seal failure was an issue early on and could be prevented with an update to the ecu.

There is a number stamped on each injector. I believe it is a flow rate, I can't remember for sure. So you would want to replace an injector marked "1" with another "1" and ect.