Here's the latest from my 2017 Corvette Grand Sport. I changed this when the OLM read 25%, which amounted to 6 months (a bunch of which was winter storage) and 3,848 miles. However, those miles included ~6 hours on the track. The reason for the 1 qt of makeup is because Chevy recommends running the oil level a bit higher for track driving. It doesn't really burn any oil.
I have since switched to the new Mobil 1 Formula ESP 0w40 which is the new factory fill.
For those wondering, the car does have the dry sump system which is about 10 quarts. The highest on-track oil temps I see are 270 F, according to the PDR data. Pressure remains rock-solid across the 30-minute sessions as well.
Blackstone's comments were that the wear metals from break-in are largely gone but may continue to fall slightly on the next sample. They said TBN and TAN looked fine.
Code:
OIL M1 5w30 M1 5w30 M1 5w30
MILES IN USE 3,848 5,651 741
MILES 10,240 6,392 741
SAMPLE TAKEN 6/22/18 9/22/17 4/12/17
ALUMINUM 6 10 3
CHROMIUM 1 2 1
IRON 34 53 48
COPPER 5 13 28
LEAD 1 1 1
TIN 0 0 0
MOLYBDENUM 80 76 84
NICKEL 0 0 0
MANGANESE 1 2 2
SILVER 0 0 0
TITANIUM 0 0 0
POTASSIUM 2 5 10
BORON 66 54 106
SILICON 12 40 74
SODIUM 4 5 7
CALCIUM 1103 956 1043
MAGNESIUM 779 682 624
PHOSPHORUS 735 627 692
ZINC 819 733 753
BARIUM 0 0 0
INSOLUBLES 0.1 0.1 -
WATER 0 0 0
FLASHPOINT ºF 395 390 SHORT
SUS VIS 210ºF 56.8 54.8 -
cSt @ 212ºF 9.29 8.71 SHORT
TBN 4.4 4.6 6.2
TAN 2.8 4.7 1.9
Credit to Matt Hastings Photography for this awesome photo of it at-speed last month at Autobahn Country Club!
I have since switched to the new Mobil 1 Formula ESP 0w40 which is the new factory fill.
For those wondering, the car does have the dry sump system which is about 10 quarts. The highest on-track oil temps I see are 270 F, according to the PDR data. Pressure remains rock-solid across the 30-minute sessions as well.
Blackstone's comments were that the wear metals from break-in are largely gone but may continue to fall slightly on the next sample. They said TBN and TAN looked fine.
Code:
OIL M1 5w30 M1 5w30 M1 5w30
MILES IN USE 3,848 5,651 741
MILES 10,240 6,392 741
SAMPLE TAKEN 6/22/18 9/22/17 4/12/17
ALUMINUM 6 10 3
CHROMIUM 1 2 1
IRON 34 53 48
COPPER 5 13 28
LEAD 1 1 1
TIN 0 0 0
MOLYBDENUM 80 76 84
NICKEL 0 0 0
MANGANESE 1 2 2
SILVER 0 0 0
TITANIUM 0 0 0
POTASSIUM 2 5 10
BORON 66 54 106
SILICON 12 40 74
SODIUM 4 5 7
CALCIUM 1103 956 1043
MAGNESIUM 779 682 624
PHOSPHORUS 735 627 692
ZINC 819 733 753
BARIUM 0 0 0
INSOLUBLES 0.1 0.1 -
WATER 0 0 0
FLASHPOINT ºF 395 390 SHORT
SUS VIS 210ºF 56.8 54.8 -
cSt @ 212ºF 9.29 8.71 SHORT
TBN 4.4 4.6 6.2
TAN 2.8 4.7 1.9
Credit to Matt Hastings Photography for this awesome photo of it at-speed last month at Autobahn Country Club!