What Oil am I supposed to use? The dealer told me to use 20w50 but my Mower manual says to use 15w50. Just searched online and found here http://www.hydro-gear.com/Main/docs/service-repair-manuals/zt-2800-3100-3200-3400.pdf that it shows to use the 20w50. Which shall I use? Also anybody have experience with using Synthetic oils? Good or bad for these Hydros?
Go by manual & use OEM specified fluid only, that way you'll be covered. Synthetic oil is required, use it, components will run cooler & longer period of time between maintenance intervals.
Appreciate it. Didn't realize it required synthetic. I actually just put in a couple ounces to bring the overflow tank back up to he cold line after the first mow. It wasn't much and it wasn't synthetic. Do you think a few ounces of conventional will hurt? The overflow had just enough for the bottom of the reservoir to be covered and I brought it back up to the cold fill line.
