TheSubaruGuruBoston answered 3 years ago
The old SOHC 2.5i will be fine on anything. If you've minor seepage or hot summers use 20w50. If winters are involved back off to 10w40 year-round. Under no circumstances use 5w or especially 0w in these old 2.5s.... Synth is now available at nearly the same price as dino, so take your pick. I use 5w30 synth in the newer motors, but 10w40 in the old ones to reduce seepage. Believe me, it doesn't matter much. Just keep the level full and your cooling system perfect, as they HATE to be overheated! Good luck.
Hey guys just wondering what would be the best oil For me to run in my Subaru B4 liberty and if it should be fully synth or semi?
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