AMSOIL produces some of the best synthetic lubricants in the business. In fact, there are probably none better. However, one thing you should always keep in mind is to use the oil specifications recommended by the equipment manufacturer. Nobody is required to use any particular brand of oil regardless of what a dealer might tell you.</P>
The Kubotadiesel engines require any viscosity from 5W-20 to 15W-40 depending on outside air temperature. All of the Kubota diesels require an oil with at least a CD rating. All of the AMSOIL diesel oilshave a rating that exceeds the basic CDrating that Kubota requires, whether it be their single viscosity 30W diesel oil, their 15W40 Synthetic Diesel & Marine Oil, their 15W40 Synthetic Blend Gas & Diesel Oil, or theirSeries 3000 Synthetic Diesel Oil.Whatever you choose, you won't go wrong with the appropriate AMSOIL lubricant. You will also find that, with proper filtration, your oil-change intervals can be safely extended beyond the normal recommendations.</P>
As a matter of interest, if there was ever an equipment failure due to the use of anappropriate AMSOIL product in that machine, and it could be proved thatAMSOIL's product was at fault, theywould cover the costs which would be limited to: 1. Replacement of the lubricant or lubricating fluid, and 2. The cost of labor, materials and mechanical components required to remedy the damage done to the equipment in which the AMSOIL product was used. Hope this helps.</P>