Shell Rimula 15w-40, Yanmar 4-cyl, 1250 hours

[sdan27]

This is the engine from our Gehl V270 skid steer. Used every day to clean cattle barns. Using a slightly oversize Fleetguard LF3369. Last two samples are the same oil change and still have not changed oil. Think I'll go another 500 hours and either sample or drain it then.

Oil T 250, 504, 749, 1250
Unit T 482, 991, 1740, 2250
Oil C y, y, n, n

Iron 16, 20, 28, 56
Chrm 0, 0, 0, 1
Alum 1, 1, 1, 2
Copp 21, 7, 3, 5
Sili 5, 6, 8, 11
Sodi 3, 4, 3, 4
Pot 2, 0, 0, 0
Moly 10, 8, 62, 61
Bor 4, 5, 10, 8
Magn 685, 778, 844, 824
Calc 1043, 1269, 1469, 1465
Phos 867, 993, 1119, 1080
Zinc 1043, 1200, 1315, 1347

Fuel H2O Soot TBN 4.44, 4.92, 4.75, 3.79
Oxid 13, 15, 13, 21
Nitr 17, 19, 8, 17

 

[chubbs1]

Looks like an excellent engine. Very nice results!

 

[daman]

Whats Visc?? iron is creeping up.

 

[dnewton3]

Fe is "creeping up" at a very reasonable, desireable rate and is no where near any reasonable condemnation level. The first three UOAs were at 250 hours, but this one was double at 500 hours, so the rate is not as exponential as first seen. Where is your condemnation for Fe? 100ppm or 150ppm as a limit?

Everything else is VERY well controlled, and I concur that 500 more hours is probably doable.

Hey - why no Service Pro? That stuff has been doing very well by you.

 

[Chris142]

Where did you find the rimula? Isn't that normally for export? Popular in Australia I believe

 

[Doug Hillary]

Hi,
daman - Wear metals are accumulative

 

[sdan27]

The first UOA I changed the oil at 250 hours. The second I changed the oil at 500 hours. The third, I took a sample after 750 hours and the fourth is the same oil as the third but after 1250 hours. My condemnation limit for Iron is 100 ppm. I wanted to switch to a CJ-4 oil and where we get our oil, the guy talked my into trying Rimula since it was virtually the same cost as Service Pro. I think it was only a few cents more or less difference per gallon. We're paing like $7 or $8 dollars a gallon so its the cheapest HD oil we can buy in bulk. Viscosity from left to right is 13.9, 13.5, 13.8, 14.4. My work computer was making it difficult to switch easily between pages.

 

[3311]

So the oil has been in service 500 hours or 1250 hours. The way I initially read it was that this oil was in service for 1250.

 

[Blaze]

What does Yanmar in your skid steer say about oil change length? The three cylinder Yanmar in my Deere tractor says every 200 hrs.

 

[sdan27]

Yes, the current oil has been in the service for 1250 hours. Yanmar recommends a 250 hour OCI.

 

[dnewton3]

You are at 5x the OEM OCI, and have great numbers.

Clearly shows how overly-conservative many OEM OCIs really are.

 

[The motor guy]

doesn't make any sense. How can he have the same tbn at 250hrs and then have about the same tbn again after 1250hrs.

 

[sdan27]

Well, went to 1750 hours on the same unit but this time I changed the oil and filter. Probably could have gone further yet. The reason the TBN went up from 3.2 to 4.5 is that a couple quarts of oil was added shortly before I drew the sample and changed the oil. These number are only the most recent sample. Do you think its even worth to take the next sample before I have 1500 hours on the oil?

Iron 63
Chrm 1
Alum 1
Copp 4
Sili 11
Sodi 5
Pot 2
Moly 60
Boro 7
Magn 887
Calc 1483
Phos 1193
Zinc 1416

Fuel Soot .2%
H2O Visc 15.9
TBN 4.5
Oxid 22
Nitr 15

 

[skyship]

It's probably fine for 1500 hrs, but ask the lab for some universal averages as it's tough to figure out a UOA without them. The slightly high Fe might be normal for example.