I am a little baffled, a battery blanket and glow plugs are referring to the engine oil. Your question is regarding the 10w-thirty employed as hydraulic oil in older equipment. Yes, 10w-thirty was and continues to be employed my many machines of that era even while in the chilly. I https://types-of-scooters00000.blogspothub.com/26954397/examine-this-report-on-types-of-hydraulic-fluid-for-bobcat-753