This is a Shibaura 3-cylinder diesel engine powering a generator. The brand of the genset is Alaska Diesel. Engine displacement is 0.716 L providing 10 HP and 6KW. The genset backs up an off-grid power system of solar panels and a micro hydrogenerator. All filters--air, oil, and fuel--are Wix. The generator has 5000 hours total on it, all run at 1800 rpm. I always change the oil, oil filter, and fuel filter every 200 hours, and the coolant and air filter every 1000 hours. Fuel is HSD with additives: HPPF Killem and PS White. Analysis by Blackstone. Displayed below are data from the most recent oil change at 5000 hours and from a change at 3200 hours. The oil run from 4800 to 5000 hours was Shell RTS 5W-40/CH-4. This was the only run of Shell ever--I had the old stock on hand and wanted to use it up. Heretofore I had always used Chevron Delo 400 15W-40. The oil in use between 3000 and 3200 hours was rated CI-4, but not Plus.
Properties Shell@5000 hrs Chevron @3200 hrs
02/06/07 08/01/04
ALUMINUM 5 3
CHROMIUM 1 0
IRON 56 12
COPPER 7 1
LEAD 1 0
TIN 0 0
MOLYBDENUM 0 0
NICKEL 0 0
MANGANESE 0 0
SILVER 0 0
TITANIUM 0 0
POTASSIUM 1 2
BORON 0 0
SILICON 13 3
SODIUM 16 8
CALCIUM 4160 2968
MAGNESIUM 10 5
PHOSPHORUS 1094 1025
ZINC 1348 1247
BARIUM 0 0
SUS Vis @210F=98.1
Flashpoint in F=420
Fuel % = Antifreeze % = ?
Water % = 0.0
Insolubles % = 0.5
BLACKSTONE COMMENTS:
Note the significant jump in iron and copper. We also found higher levels of silicon and sodium. None of these findings is really a major concern at this point, though wear and silicon could be related if silicon is from abrasive dirt. Sodium could be from antifreeze, though at this level it's hard to say for sure. The TBN read at 9.5, which is a strong reading and shows the oil has a lot of active additive left. The high viscosity could have been due to an oil additive or may show the oil is breaking down. The cSt at 100 degrees C was 19.9. Check back next oil change.
MY COMMENTS: Uh, oh. I'm not pleased with the results of this analysis. Believe I should have changed the air filter sooner, and that accounts for the silicon and some increased wear. Just glad the lead is still low, so apparently the bearings did not take a beating. Not sure about the sodium. There's no water in the sample, so probably coolant is NOT getting into the oil. I have had to add some coolant, but because of leaky hose. Suppose it's possible the hose as well as a gasket was leaking. I added nothing to the oil, so the thickening is disappointing. Guess it's just not up to task. I replaced it with newer RTS (CI-4 plus); I'm not sure whether to run it for 200 hours or to change it sooner and get another snapshot of how the engine's doing.
I welcome your observations and comments.
Cheers, Mark
Properties Shell@5000 hrs Chevron @3200 hrs
02/06/07 08/01/04
ALUMINUM 5 3
CHROMIUM 1 0
IRON 56 12
COPPER 7 1
LEAD 1 0
TIN 0 0
MOLYBDENUM 0 0
NICKEL 0 0
MANGANESE 0 0
SILVER 0 0
TITANIUM 0 0
POTASSIUM 1 2
BORON 0 0
SILICON 13 3
SODIUM 16 8
CALCIUM 4160 2968
MAGNESIUM 10 5
PHOSPHORUS 1094 1025
ZINC 1348 1247
BARIUM 0 0
SUS Vis @210F=98.1
Flashpoint in F=420
Fuel % = Antifreeze % = ?
Water % = 0.0
Insolubles % = 0.5
BLACKSTONE COMMENTS:
Note the significant jump in iron and copper. We also found higher levels of silicon and sodium. None of these findings is really a major concern at this point, though wear and silicon could be related if silicon is from abrasive dirt. Sodium could be from antifreeze, though at this level it's hard to say for sure. The TBN read at 9.5, which is a strong reading and shows the oil has a lot of active additive left. The high viscosity could have been due to an oil additive or may show the oil is breaking down. The cSt at 100 degrees C was 19.9. Check back next oil change.
MY COMMENTS: Uh, oh. I'm not pleased with the results of this analysis. Believe I should have changed the air filter sooner, and that accounts for the silicon and some increased wear. Just glad the lead is still low, so apparently the bearings did not take a beating. Not sure about the sodium. There's no water in the sample, so probably coolant is NOT getting into the oil. I have had to add some coolant, but because of leaky hose. Suppose it's possible the hose as well as a gasket was leaking. I added nothing to the oil, so the thickening is disappointing. Guess it's just not up to task. I replaced it with newer RTS (CI-4 plus); I'm not sure whether to run it for 200 hours or to change it sooner and get another snapshot of how the engine's doing.
I welcome your observations and comments.
Cheers, Mark