Black oil

   #1  

K man

Platinum Member
Joined
May 11, 2014
Messages
674
Location
Quadeville, ont
Tractor
2014 Kioti CK 30 HST with cab. 2018 Cub Cadet Challenger 750 EPS UTV
Hi all Kioti owners. I have 2014 CK30 HST ( 125 hours ) and notice every years when replacing the oil that it is pretty dark. The tractor is not used very much other than snow blowing or a bit of landscaping, it sits more than anything else in the garage. I was told by the dealer that the Kioti engines are know for this as they do not run hot enough to overheat which causes the oil to be black. Anyone have any input on this.
Thanks
 

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   #2  

bearthebruce

Gold Member
Joined
Jul 26, 2018
Messages
317
Location
Property is in Floyd County VA
Tractor
'05 Massey Ferguson MF1533
Not a Kioti owner.. a 2005 Massey owner. Engine oil always comes out very dark black @100 hours of service. I'm told that it is normal for a diesel engine.

When we first started using this machine, it had been sitting for a lot of years. We put fresh oil in, ran it for about 25 hours and then drained again. It was very very black.

I think what you see is pretty normal on diesel engines.
 
   #3  

Robin Veerman

Gold Member
Joined
Jan 19, 2018
Messages
280
Location
ONTARIO Canada
Tractor
2014 Kioti CK30HST
I have the same tractor, year and model, but 460 hours or so. I change the oil yearly. When I checked the dipstick recently the oil mark was difficult to see, the oil was so clear with about 65 hours on it. I use my tractor for mowing and snow blowing plus other chores. I do run it hard when I can and don’t idle it very much. I use Amsoil synthetic oil and I’m considering skipping the changes to every other year, seeing that my use is around 65 hrs annually. I watch my temperature gauge to watch the temperature and it usually runs quite cool in the winter time. I block the rad with a 4” strip of cardboard right down the centre (winter only!!)and that helps bring the temp up a bit more…
 
   #4  

arto98607

Platinum Member
Joined
Aug 27, 2014
Messages
749
Location
Southwest WA
Tractor
Kubota F3060, Grasshopper 721D, Ford 1310, John Deere 440 ICD, John Deere 300
I know it's old school thinking but I change my tractor & mower Diesel engine oil at 50 hour interval and my old engines still purr like new.

For me it's easy to justify: Oil & filters are cheap - Diesel engine overhaul is expensive, even if DIY as I do all maintenance & repairs if needed.


Anyway, the used Diesel engine oil is usually pretty dark and I would not worry much, as long as the oil is not being diluted or the oil level is not going up!

Cheers

Mechanic.jpg
 
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   #5  

LD1

Epic Contributor
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Apr 30, 2008
Messages
20,423
Location
Central Ohio
Tractor
Kubota MX5100
Its normal. Its not a gas engine, diesel makes soot, oil encapsulates it. Its fine and doing what its supposed to.

The "kioti engines are know for this because they dont run hot enough...." is a BS line fed to you by the dealer to try and make you go away happy and not ask any more questions.

Its NOT a kioti thing....its a DIESEL ENGINE thing.
 
   #6  

RalphVa

Super Member
Joined
Dec 19, 2003
Messages
7,338
Location
Charlottesville, VA, USA
Tractor
JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
I'd say it's more like 1980ish engines. The oil on our 1983 240D Benz was always coal black, even a few seconds after a change. They haven't sealed off the piston rings well enough like in better, more modern engines, like our 2010 VW diesel or 2015 JD. The Isuzu's oil has always been very clean.
 
   #7  

Borane4

New member
Joined
Dec 21, 2020
Messages
14
Tractor
Kubota MX5400
Diesel motor oil is always black. When I was an auto mechanic most of the clients had gas engines and I hated doing diesel oil changes because it made my hands uncleanable. That was before all the youtube mechanics started wearing gloves like surgeons to work on cars... :)
 
   #8  

Buggs67

Veteran Member
Joined
Apr 10, 2014
Messages
1,097
Location
Perry Cty, Pennsylvania
Tractor
Kioti 2014 CK2510 TLB
Re: the oil, mine is also black when changed.
I use my tractor frequently, but not always for more than an hour or two. I average about 100 hrs/year. To have a 7 yr old tractor with only 125 hrs seems strange.
FWIW the manual suggests oil/filter change every 100 hrs. I follow this and use Rotella T6 full synthetic and WIX filters.
And my tractor runs in the middle of the temp range per gauge.
 
   #9  

TractorTYMe

Gold Member
Joined
Jul 8, 2020
Messages
469
Location
Flathead County, NW MT
Tractor
TYM T474 HST
I have a 2014 Chevy Cruze Turbo Diesel. It blackens the oil in 50 miles. My Tractor blackens it after about 4-5h of use. It shows it is doing its job.
 
  
  • Thread Starter
#10  
OP
K man

K man

Platinum Member
Joined
May 11, 2014
Messages
674
Location
Quadeville, ont
Tractor
2014 Kioti CK 30 HST with cab. 2018 Cub Cadet Challenger 750 EPS UTV
Thanks you all for your input now I understand that is normal on Diesel engines. I will still change the oil every Fall just for easier starting in the Winter months as they get pretty cold up here in the North Country.
 
 
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