in the uk its recommended to use 15w40
SAE 10w30 any major brand. I recommend you use a 100% synthetic oil.
what hydraulic oil to use on Kubota L39
Kubota UDT oil or can use Case IH HY trans ultra.
Kubota zero turn mowers
Fram does not have a filter that will cross-over. Baldwin filters cross over for HHTA0-59900 would be a BT9358. I would recommend NOT using Fram filters on your Kubota. Use Kubota, Wix or Baldwin filters.
You can use any kind of 10w-40 oil for a nighthawk
Baby oil
Most use Synthetic Oil.
Oil filter part number is 121965 Or you could use the longer and more common Fram PH8A (common on Fords) or equivelant.
Rocket oil
They use the oil God gave them in their oil glands.