This vehicle was purchased from the dealer with 10,800 miles on it. I'll not go into the customer experience portion of the transaction as it was terrible. Needless to say, I obtained no service records and started my own records beginning from the mileage purchased. On a side note, I believe this vehicle was a demo ride for it's first 10,800 miles. No records were ever reported to the DMV as an owner.
This was my first analysis. I'd planned on my 2005 Silverado getting the first but as of 6,500 miles on Castrol GTX 5W-30, the GM OLM hasn't kicked on yet, so we'll see where she takes us to. I've refilled the Tahoe with Castrol GTX 5W-30 and a NAPA Gold filter and am going to take it out to either 4000 miles as suggested in the report or when the OLM tells me to change it. I haven't decided yet. I believe I'm going to do a transmission sample as well sometime in the near future. So, without further adieu...
EQUIPMENT MAKE: GM
EQUIPMENT MODEL: 4.8L V-8
FUEL TYPE: Gasoline (Unleaded)
OIL USE INTERVAL: Miles
OIL TYPE & GRADE: 5W/30 (gas)
MAKE-UP OIL ADDED: 0 qts
JASON: New GM engines tend to leave copper high in the oil for as long as 50,000 miles though you should see a tapering off of this metals with each subsequent oil analysis. This engine is new enough that we think the silicon and sodium are leftovers from the factory, and these elements should drop to average in the next sample. Universal averages show typical wear metals for an oil from this type of engine after about 3,665 miles run on the oil. This oil may have been run longer than that. Try a 4,000 mi oil use run for the next sample. This should be a nice engine for you.
MI/HR ON UNIT - 10,946
ELEMENTS IN PPM
UNIT AVG UNIV AVG
ALUMINUM 3 2
CHROMIUM 1 1
IRON 23 15
COPPER 75 28
LEAD 8 7
TIN 1 1
MOLYBDENUM 283 56
NICKEL 1 0
MANGANESE 2 0
SILVER 0 0
TITANIUM 0 0
POTASSIUM 0 1
BORON 17 51
SILICON 25 11
SODIUM 14 5
CALCIUM 1286 2102
MAGNESIUM 31 110
PHOSPHORUS 489 749
ZINC 597 906
BARIUM 0 0
PROPERTIES
VALUES SHOULD BE VS. VALUES TESTED
SUS VISCOSITY @ 210*F 54-61 56.3
FLASHPOINT IN *F >365 365
FUEL % ANTIFREEZE % 0 0.0
WATER % INSOLUBLES % <0.6 0.5
This was my first analysis. I'd planned on my 2005 Silverado getting the first but as of 6,500 miles on Castrol GTX 5W-30, the GM OLM hasn't kicked on yet, so we'll see where she takes us to. I've refilled the Tahoe with Castrol GTX 5W-30 and a NAPA Gold filter and am going to take it out to either 4000 miles as suggested in the report or when the OLM tells me to change it. I haven't decided yet. I believe I'm going to do a transmission sample as well sometime in the near future. So, without further adieu...
EQUIPMENT MAKE: GM
EQUIPMENT MODEL: 4.8L V-8
FUEL TYPE: Gasoline (Unleaded)
OIL USE INTERVAL: Miles
OIL TYPE & GRADE: 5W/30 (gas)
MAKE-UP OIL ADDED: 0 qts
JASON: New GM engines tend to leave copper high in the oil for as long as 50,000 miles though you should see a tapering off of this metals with each subsequent oil analysis. This engine is new enough that we think the silicon and sodium are leftovers from the factory, and these elements should drop to average in the next sample. Universal averages show typical wear metals for an oil from this type of engine after about 3,665 miles run on the oil. This oil may have been run longer than that. Try a 4,000 mi oil use run for the next sample. This should be a nice engine for you.
MI/HR ON UNIT - 10,946
ELEMENTS IN PPM
UNIT AVG UNIV AVG
ALUMINUM 3 2
CHROMIUM 1 1
IRON 23 15
COPPER 75 28
LEAD 8 7
TIN 1 1
MOLYBDENUM 283 56
NICKEL 1 0
MANGANESE 2 0
SILVER 0 0
TITANIUM 0 0
POTASSIUM 0 1
BORON 17 51
SILICON 25 11
SODIUM 14 5
CALCIUM 1286 2102
MAGNESIUM 31 110
PHOSPHORUS 489 749
ZINC 597 906
BARIUM 0 0
PROPERTIES
VALUES SHOULD BE VS. VALUES TESTED
SUS VISCOSITY @ 210*F 54-61 56.3
FLASHPOINT IN *F >365 365
FUEL % ANTIFREEZE % 0 0.0
WATER % INSOLUBLES % <0.6 0.5
