My former 152 used Aeroshell 15W50. Costco was selling it at a good price, but there's no Costco in my city. I went to a local oil distributor and they ordered it for me at wholesale price, very good deal. But after two years or so, they said they no longer sell to individuals. I then started buying online from www.airplaneoil.com [airplaneoil.com] .

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