[s-cars] Castrol GTX High Mileage Oil

[Thomas Rodriguez]

My '95 S6 has 245K miles.  Head was rebuilt about 40K miles ago but
otherwise the engine is original. I've been using Mobil 1 5W/30 synthetic
motor oil for as long as I can remember. Engine runs strong. I add about a
quart between scheduled oil and filter changes every 3K miles.  Otherwise
there are no signs of burning or leaking oil.

Last week my mechanic recommended we switch to Castrol GTX High Mileage
5W/30. I agreed and have driven about 300 miles with this oil in the
engine.  I understand that this oil is not synthetic.

Any thoughts about using the Castrol GTX HM oil?

Tom
'95 S6