I have been using Mobil 1 truck&suv 5w-40 for a while. All purchased from Walmart. But lately I have not been able to find it at all the Walmarts(Boston area) I visit
. Where else can I buy this oil? What other sythetic should I use that are available locally?
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2004 HO QC dually, NV5600

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2004 HO QC dually, NV5600