Please contact me. Need info on using a single oil for all my vehicles, car 5-30, truck 5-20, motorcycle 10-40, kubota diesel 10-30 or 15-40. Will Amsoil 10-40 premium protection, black cap bottles, work in all my vehicles? Says compatible for all gas, diesel, and motorcycles. But will the 10-40 work for all my vehicles? Thanks hjt
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