Kubota RTV1100 Oil Weight

[dconine]

Hello, I have a Kubota RTV1100 with 150 hours on it. I'm getting ready to change the oil in this unit again. I am currently running 15W-40 oil in this engine & would like to switch to an oil weight that I can run year round. The Kubota manual calls out 10w-30 for year round use but it doesn't show anything suggested to use in really hot temps.

Can I safely run 0w-40 synthetic diesel oil to run in this engine even though it doesn't list this as a suggested weight? Or does the 30w in 10w-30 protect enough. I notice sometimes it takes a few seconds for the oil light to go out when I'm running 15w-40. I would prefer the protection of the 40w if I can do that.

I can see temps anywhere from single digits to triple digits. Any suggestions or thoughts? Thanks.

 

[PHILIP8N]

I prefer 5w-40 HDEO, but a 0w-40 HDEO would be fine too. Philip.

 

[KennyV]

I agree with Philip, your choice sounds great, What brand 0w-40 Synthetic Diesel have you found?

 

[dconine]

I have heard that Schaefers makes a good 0W-40 full synthetic. I still had some concern since the manual doesn't list this as an approved weight. Will this still be all right?

 

[PHILIP8N]

Unfortunetly, in the area of recommended oil viscosity, the Kubota manual is outdated, not written well, and has mistakes. Here is a copy out of my Cat manual. Use this as a good guide. 0w-40 HDEO is available, but can be a hard find, and expensive. Unless you are living in aritc climates, not really needed. 5w-40 HDEO is well respected, and can be found almost everywhere. Philip.

 

[KennyV]

Again Philip is Right...
I run Rotella (synthetic) T6 5W-40 in Every engine... Gasoline and Diesel. It is a great synthetic Diesel oil that is available for around $20 a gallon at WalMart and various auto parts stores... KennyV