Oil & Fuel Viscosity

[sandyc]

Well here goes....time to start another battle.

I am approaching my first oil change and like with past tractors I have switched out from the dino to the synthetic. No big deal except I got some 5w-40 Mobil one turbo diesel truck oil. I looked up the specs in my manual for my B2620 and found they recommend 10w-30. OK, I'll check with Kubota.....they said they only recommend Kubota oil and I should check my manual. Hmmmmm, I'll check with Mobil about using the different viscosity and they said sure no problem. Now I am left with a nagging doubt as to who to put my faith in.
Anybody dealt with this situation before?

 

[oldnslo]

I would use what ever you are comfortable using. I used 5W-40 in my BX and now have it in my Branson. The 5W gives better cold start protection and 40w gets a little thicker when hot.

 

[sandyc]

thanks for the response....I agree that you should do what is comfortable to you. My gut was that Kubota was just doing the corporate CYA

 

[Deano]

I would use what ever you are comfortable using. I used 5W-40 in my BX and now have it in my Branson. The 5W gives better cold start protection and 40w gets a little thicker when hot.

I second that. I am using full synthetic 10w-30 valvoline synpower but will switch to rotella t6 on my next change. I am at 930 hours.

 

[murphy1244]

Under warranty I would use what the manufacture advises to CYA.

 

[Gale Hawkins]

Well here goes....time to start another battle.

I am approaching my first oil change and like with past tractors I have switched out from the dino to the synthetic. No big deal except I got some 5w-40 Mobil one turbo diesel truck oil. I looked up the specs in my manual for my B2620 and found they recommend 10w-30. OK, I'll check with Kubota.....they said they only recommend Kubota oil and I should check my manual. Hmmmmm, I'll check with Mobil about using the different viscosity and they said sure no problem. Now I am left with a nagging doubt as to who to put my faith in.
Anybody dealt with this situation before?

Follow the $$$ trail and see how it impacts advice.

5W-40 is a good option for most diesel engines that I have met.

 

[WilliamBos]

Under warranty I would use what the manufacture advises to CYA.

They cant force you to use Kubota oil, Magnusson-Moss prevents that. But I think they could nail you on the viscosity if it does not meet the ambient temps. I know MF stated as long as it met the ambient temps, you are ok.

 

[Gale Hawkins]

Kubota Engine America - Compact Diesel Engines

Yes, many of our customers use 15W40 engine oil in their Kubota diesels.

 

[sandyc]

All great points. I am still under warranty so I wouldn't want to give the corporate types any ammo to decline a claim during that period. Maybe I'll just stick with the Kubota oil until the unit is not covered.

 

[PHILIP8N]

I believe 5w-40 to be a superior oil in many ways over a 10w-30 (C class oils), and is what I am running now, which is very similar to the T6 mentioned above (I run M1 5w-40). Some people mention warranty, I do not buy into that. Kubota would have to prove that a different viscosity caused the failure. An oil leak resulting in all loss of oil pressure, or a rod bolt coming loose and destroying an engine, are not viscosity related, it is assembly related. Plus, how many failures of there of Kubota engines, very few and far between. The way I look at it, I want to protect my engine right from day one, because it is going to be with me a long time after the short Kubota warranty runs out, and Philips lifetime warranty takes over. Philip.