Hmm, it seems there are a lot of different opinions on the oil grade, which makes things a little confusing
I have just had my 03 wrx serviced by a Subaru 'specialist; and on their recommendation they used Castrol Edge 10W/60.
Do you think this is too thick?
What would be the effect?
Car was previously running Castrol Magnatec 10W-40.
Thanks!