Hello!
I purchased a 2007 Chevrolet Corvette with the 6.0L LS2 engine last year with ~45,000 km on it. I've run Mobil 1 5W30 the entire time I've owned it and I believe the previous owner ran primarily Chevrolet house brand (Mobil1 5W30?) since new based on nearly comprehensive records, with oil changes every year.
I was changing the oil at the beginning of this summer and noticed some sludge stuck to the magnetic drain plug and some suspicious looking debris in the used oil. After seeing this I decided to collect a sample for analysis in order to see what was going on with the engine. Note, that I didn't collect the cleanest sample since it was collected out of a semi-clean oil catch basin (probably contributing to the higher Si reading). I also inspected the debris in the oil and it largely appeared to be dark material, which wasn't magnetic. The oil filter didn't show any metal debris either.
The car sees pretty light use since I'm in the cold north and don't like taking my chances out on the frozen tundra. There is the occasional spirited driving, but I've never been to a track day or AutoX. I strongly suspect the car has never seen any real abuse based on discussions with the previous owner.
The car runs and drives great, good power with no excessive noises. It occasionally has a loud ticking under WOT up around 5k rpm but is rare and disappears quickly when off throttle.
I've done some reading on this forum and others and I know that Copper can be high in these LS2 engines, but I'm wondering if I have any issues here to worry about with the high Cu amount and ticking noises.
Thanks for the help!
Code:
OIL M1 5W30
MILES IN USE 4,160km (2,585 miles)
MILES 53,200km (33k miles)
SAMPLE TAKEN 05/26/2018
ALUMINUM 6
CHROMIUM 5
IRON 42
COPPER 132
LEAD 5
TIN 2
MOLYBDENUM N/A
NICKEL 0
MANGANESE N/A
SILVER 0
TITANIUM N/A
POTASSIUM N/A
BORON 0
SILICON 23
SODIUM 0
CALCIUM 895
MAGNESIUM N/A
PHOSPHORUS 1069
ZINC 769
BARIUM N/A
INSOLUBLES 1.5
WATER 0
FUEL DILUTION 0
cSt @ 212ºF 10.4
TBN 7.5
OXIDATION 0.4
ANTIFREEZE % 0
I purchased a 2007 Chevrolet Corvette with the 6.0L LS2 engine last year with ~45,000 km on it. I've run Mobil 1 5W30 the entire time I've owned it and I believe the previous owner ran primarily Chevrolet house brand (Mobil1 5W30?) since new based on nearly comprehensive records, with oil changes every year.
I was changing the oil at the beginning of this summer and noticed some sludge stuck to the magnetic drain plug and some suspicious looking debris in the used oil. After seeing this I decided to collect a sample for analysis in order to see what was going on with the engine. Note, that I didn't collect the cleanest sample since it was collected out of a semi-clean oil catch basin (probably contributing to the higher Si reading). I also inspected the debris in the oil and it largely appeared to be dark material, which wasn't magnetic. The oil filter didn't show any metal debris either.
The car sees pretty light use since I'm in the cold north and don't like taking my chances out on the frozen tundra. There is the occasional spirited driving, but I've never been to a track day or AutoX. I strongly suspect the car has never seen any real abuse based on discussions with the previous owner.
The car runs and drives great, good power with no excessive noises. It occasionally has a loud ticking under WOT up around 5k rpm but is rare and disappears quickly when off throttle.
I've done some reading on this forum and others and I know that Copper can be high in these LS2 engines, but I'm wondering if I have any issues here to worry about with the high Cu amount and ticking noises.
Thanks for the help!
Code:
OIL M1 5W30
MILES IN USE 4,160km (2,585 miles)
MILES 53,200km (33k miles)
SAMPLE TAKEN 05/26/2018
ALUMINUM 6
CHROMIUM 5
IRON 42
COPPER 132
LEAD 5
TIN 2
MOLYBDENUM N/A
NICKEL 0
MANGANESE N/A
SILVER 0
TITANIUM N/A
POTASSIUM N/A
BORON 0
SILICON 23
SODIUM 0
CALCIUM 895
MAGNESIUM N/A
PHOSPHORUS 1069
ZINC 769
BARIUM N/A
INSOLUBLES 1.5
WATER 0
FUEL DILUTION 0
cSt @ 212ºF 10.4
TBN 7.5
OXIDATION 0.4
ANTIFREEZE % 0
Last edited: