Hi guys. I have a 2006 Cub Cadet RZT50, with the Hydrogear hydrostat transmissions. It has about 275 hours on it. Anyways, I pulled one of the hydros to drain the oil. I pulled the fill plug, turned it upside down, and it is draining as I type. I'm going to pick up some fresh oil for it tomorrow. My question is, I've seen recommendations anywhere from 10w-30 to 15w-40 HDEO to 20w-50 MC oil. I'm asking for your "professional" opinions on what to put back in there. It gets hot here, in the summer. Up to 105F, on occasion. I mow about 2 acres, and it takes about 1 1/2 hours. Any input would be appreciated. Thanks.
Almost forgot, when I get this one back on, I plan on doing the other side. Thanks.
Almost forgot, when I get this one back on, I plan on doing the other side. Thanks.
Last edited: