Originally Posted By: edhackett
What Dennis said. It's right in the owner's manual. Recommended grade anything from 5W-30 to 20w-50, depending on conditions. Synthetic OK at their recommended OCI.
Ed
..what is says in the manual about oil grades,..they have been saying this for decades, my early '80's manual says the same thing..it really needs an update, and also an article at "subaru endwrench" recommended 10w20 for towing (no longer available or easily gotten).. the point here is that for towing it still takes a Xw20..think about it,..under what "conditions" would the car have to be in to safely use a 20w50 especially with bearing clearances of .0005(quarter of your hair width)( not a good idea)..I used this 20w50 weight way back in the sixties because the piston bores where so greatly enlarged from wear and bearing clearances of .0015 (much larger),that the next step for lubrication would be to fill the sump with straight STP..useing heavy weight oil was the thing to do for worn out motors...