Here's a Blackstone UOA from my John Deere (33 HP, 3 cyl Yanmar diesel)955 Compact 4wd Utility Tractor that's had nothing but Rotella "T" 5w-40 Synthetic since I got it in '01 with 140 Hrs on the clock. I normally change the oil/filter every 100 hrs or 1 year. This particular change occurred with 90 hrs on it, but, the oil had been in there for about 16 months (I was a bit lazy last fall
). The tractor, when used, espcially for snow-plowing and blowing (it has a 6 foot wide, rear-PTO driven Lucknow blower), gets run pretty hard, then put away wet.
There's always something else to do, it seems. I do try to stay on top of it maintenance-wise, as it makes life much easier when I'm trying to keep five driveways cleaned out in blizzard'ish conditions, like this week.
Darn winter - I much prefer soft, easy summertime conditions.
RON: This Yanmar engine is wearing well. Nothing too unusual showed up in the spectral exam. All wear read close to averages for this type of engine, which is a very good indication of normal wearing parts. Insolubles (oil oxidation due to heat, use and blow-by) were normal at 0.4%, showing good oil filtration and complete combustion. No excessive soot was present. The oil was in good shape physically, containing no fuel or coolant. The TBN read 9.8, still lots of active additive left. As of 11/22/07, the sample date, everything looks good.
UOA #1
MI/HR ON OIL: 90
MI/HR ON UNIT: 774
DATE:11-27-07
ALUMINUM: 3
CHROMIUM: 3
IRON: 14
COPPER: 1
LEAD: 1
TIN: 0
MOLY: 1
NICKEL: 0
MANGANESE: 0
SILVER: 0
TITANIUM: 0
POTASSIUM: 0
BORON:1
SILICON: 3
SODIUM: 1
CALCIUM: 3536
MAGNESIUM: 9
PHOSPHOROUS: 1111
ZINC: 1379
BARIUM: 1
SUS VISC. @210F: 66.0
Cst Visc. @100C:11.88
Flashpoint (F): 415
Fuel %: Antifreeze %: 0.0
Water %: 0.0
Insolubles %: 0.4
TBN: 9.8
TAN:
ISO Code:
COMMENTS: “CH” rated Rotella “T”
Interesting, with all the discussion about ZDDP - the UOA above is with the older version of "T" 5w-40. I also sent a sample of virgin CI-4/SL rated oil along for a test, and it showed:
Phosphorous: 837
Zinc: 974
My stash of "old" "T" is about used up - I'm wondering what to do when it's gone?
RON: This Yanmar engine is wearing well. Nothing too unusual showed up in the spectral exam. All wear read close to averages for this type of engine, which is a very good indication of normal wearing parts. Insolubles (oil oxidation due to heat, use and blow-by) were normal at 0.4%, showing good oil filtration and complete combustion. No excessive soot was present. The oil was in good shape physically, containing no fuel or coolant. The TBN read 9.8, still lots of active additive left. As of 11/22/07, the sample date, everything looks good.
UOA #1
MI/HR ON OIL: 90
MI/HR ON UNIT: 774
DATE:11-27-07
ALUMINUM: 3
CHROMIUM: 3
IRON: 14
COPPER: 1
LEAD: 1
TIN: 0
MOLY: 1
NICKEL: 0
MANGANESE: 0
SILVER: 0
TITANIUM: 0
POTASSIUM: 0
BORON:1
SILICON: 3
SODIUM: 1
CALCIUM: 3536
MAGNESIUM: 9
PHOSPHOROUS: 1111
ZINC: 1379
BARIUM: 1
SUS VISC. @210F: 66.0
Cst Visc. @100C:11.88
Flashpoint (F): 415
Fuel %: Antifreeze %: 0.0
Water %: 0.0
Insolubles %: 0.4
TBN: 9.8
TAN:
ISO Code:
COMMENTS: “CH” rated Rotella “T”
Interesting, with all the discussion about ZDDP - the UOA above is with the older version of "T" 5w-40. I also sent a sample of virgin CI-4/SL rated oil along for a test, and it showed:
Phosphorous: 837
Zinc: 974
My stash of "old" "T" is about used up - I'm wondering what to do when it's gone?
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