Kirkland Signature 5W-30 Full Synthetic Motor Oil 5-quart, 4-pack | Costco
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Is this oil good to use in a 351W? Idk what engine mods have been done but was told to use 93 Octane. I've heard mixed responses on oil weight : r/Foxbody
MAG 1 Mag 1 30W H/D Diesel Oil 2.5 Gal in the Motor Oil & Additives department at Lowes.com