15w 40

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    Engine 1995 Mustang GT

    I’m just making this because I’ve seen a lot of threads on what engine oil everyone with a 5.0 Mustang uses and there was one that caught my eye about using 15w 40 deisel engine oil. I’ve been using Castrol GTX 15w 40 on all my cars these past 4 years from a 2006 Nissan Altima with 170k miles to...