FYI: How long can a used oil analysis sample sit on the shelf before you have to send it in for an analysis? How will shelf life effect the results?
You found an old sample you really wanted to examine but forgot. Is it still good?
I obtained an engine oil sample, divided it into two samples of equal size. I put them in identical lab supplied containers (plastic bottles). I sent one in immediately after the sampling and put the other on the shelf inside the air conditioned house. I then sent in the second sample for analysis, TWO years later. Here is the result:
Iron __________38_______41
Chromium _____1_______ Nickel _________ Aluminum ______9 ______9
lead __________ 1________1
Copper ________8_______8
Tin ____________5_______4
Silver ________ Titanium ______ Silicon ________ 6_______7
Boron ________ 9_______10
Sodium _______ 9_______10
Potassium _____ Molybdenum ____99______106
Phosphorus ____838_____923
Zinc _________ 963_____1035
Calcium ______2271_____2434
Barium _______ Magnesium ____17_______24
Antimony _____189______198
Vanadium _____ Fuel %Vol _____8.0______3.0
Vis CS 100C __ 8.3______ 8.9
SAE Grade ____20________20
Gly test ______Neg_______Neg
Abs Oxid______93_______100
Abs Nitr_______14________15
Same lab.
Ali
You found an old sample you really wanted to examine but forgot. Is it still good?
I obtained an engine oil sample, divided it into two samples of equal size. I put them in identical lab supplied containers (plastic bottles). I sent one in immediately after the sampling and put the other on the shelf inside the air conditioned house. I then sent in the second sample for analysis, TWO years later. Here is the result:
Iron __________38_______41
Chromium _____1_______ Nickel _________ Aluminum ______9 ______9
lead __________ 1________1
Copper ________8_______8
Tin ____________5_______4
Silver ________ Titanium ______ Silicon ________ 6_______7
Boron ________ 9_______10
Sodium _______ 9_______10
Potassium _____ Molybdenum ____99______106
Phosphorus ____838_____923
Zinc _________ 963_____1035
Calcium ______2271_____2434
Barium _______ Magnesium ____17_______24
Antimony _____189______198
Vanadium _____ Fuel %Vol _____8.0______3.0
Vis CS 100C __ 8.3______ 8.9
SAE Grade ____20________20
Gly test ______Neg_______Neg
Abs Oxid______93_______100
Abs Nitr_______14________15
Same lab.
Ali