As a product expert in engine oils, I highly recommend the GENUINE KUBOTA ENGINE OIL SAE 15W40 1 GALLON JUG. This high-quality product is scientifically formulated to provide superior lubrication and protection for your Kubota engine. With its SAE 15W40 viscosity, it offers excellent performance in a wide range of operating temperatures. Keep your engine running smoothly and efficiently with this genuine Kubota engine oil.