myles

The valve won't stop flow in this direction. It's meant to stop flow in the other direction.

Like I mentioned in my previous post, the OEM filters from my dealer do not have an ADV. Just to be clear, the anti-drainback valve is merely a neoprene flap that's deflected by oil flow when the engine's running, and falls back into place when there's no oil pressure to keep the oil from draining from the filter. Are you guys talking about the bypass valve, perhaps?

But an automatic _has_ gears (kick-rump roast planetary gearsets, at that!) The MPT isn't any more a differential than your manual transmission's clutch is a differential.

The OEM filter for my USDM 2002 Legacy is identical to the 14460, save for the shape of the gasket. OEM has a round cross section, while the 14460 has a rectangular cross section. Neither have an ADV. There's no need...the filter mounts vertically (with the open side pointing upward).

Correct, there's no center diff. in your car.

In the US, it's not about saving US$.05 on a part. It's about increasing the fuel economy by .01 mi/gal (thanks to CAFE). That's why some cars are shipping with (and the owner's manual is recommending the use of) 5W20!

Use the recommended fuel. If you use a fuel with a lower-than-recommended AKI, the ECU will "hear" knock (thanks to the knock sensor) and retard ignition timing and/or reduce boost. Power output and fuel economy will suffer. What's the point?

Isn't "MT 90" GL-4? His trans. requires GL-5.

The engines and transmissions for USDM Legacys are assembled in Japan.

One word (actually, one acronym): CAFE.

I think one would be safe "ripping on" the Phase-I EJ25. Remember, a Subaru is a _car_, not a religion

True, however I used the exact same pump for the "before" and "after" fill-ups.

According to an email I received from Mobil1 "tech support", all Mobil1 motor oils contain VI improvers. I was once told that the 10w30 did not, but all others did. Who knows?

I only use the 15w50 during the summer months. In the winter, I run Mobil1 10w30. My EJ25 runs terribly on 87-AKI gasoline, even after a Seafoam treatment (removes carbon from the valves and combustion chamber). Tipping the throttle results in much bogging. Remember, the Phase-II EJ25 has a compression ratio of 10:1. Seems a bit high for 87-AKI gasoline.

You have an EJ25 in your GL?