My case 1845c skid steer requires 10w30 oil in everything except coolant fuel and battery. The chain cases, the engine(diesel), and the hydralic system all spec 10w30...I have a choice with the engine but in my climate (coastal B.C.) the manual recomends 10w30. I add an additive to the hydralic oil. Which one oil can I get that will satisfy these three different demands, and what should I look at for manufactureres designations?