I run a Miata in a cheap endurance racing series. The engine is a assemblage of used stock (but basically serviceable) components, which we then turbocharged.
Before its most recent race, we put new main bearings in it and added an oil cooler. Then we refilled it with virgin M1 Turbo Diesel Truck 5w40 and ran a 14 hour endurance race. Then we did a UOA.
First, here is the VOA of the M1 TDT 5w40. Sorry for the goofy formatting, I can't seem to get the numbers to line up nicely under the respective column headings:
Cu Fe Cr Al Pb Sn Si Na K B Mo Ni Ag Ti Sb Ca Mg Zn P Ba
0 2 0 1 1 0 5 0 2 86 1 0 2 0 1 2596 556 1444 1252 0
ST OXI NIT SUL W A V100 TBN ISO
0 0 0 0 N N 15.0 12.0 17/14
5μ 10μ 15μ 20μ 25μ 50μ 75μ 100μ
1000 217 101 61 43 22 18 13
--------------------------------------------------------------
Here is the UOA after the 14hr race:
Cu Fe Cr Al Pb Sn Si Na K B Mo Ni Ag Ti Sb Ca Mg Zn P Ba
7 14 0 5 3 1 41 42 1 89 16 2 0 0 0 1469 792 1198 1094 0
ST OXI NIT SUL W A V100
0 15 10 18 T N 11.7
---------------------------------------------------------------
Unfortunately I forgot that the TBN test was extra and don't have a TBN for the UOA.
The UOA report notes "TRACE LEVELS OF WATER DETECTED. SODIUM LEVEL IS ELEVATED. NO GLYCOL DETECTED. SILICON AND
ALUMINUM LEVELS ARE ELEVATED AND MAY INDICATE DIRT ENTRY. INSPECT FOR SOURCE OF DIRT ENTRY INTO THE SYSTEM."
I'm new to UOA. Anything else here jump out to you guys as concerning? OK to run another 14hr race with this oil as-is?
Before its most recent race, we put new main bearings in it and added an oil cooler. Then we refilled it with virgin M1 Turbo Diesel Truck 5w40 and ran a 14 hour endurance race. Then we did a UOA.
First, here is the VOA of the M1 TDT 5w40. Sorry for the goofy formatting, I can't seem to get the numbers to line up nicely under the respective column headings:
Cu Fe Cr Al Pb Sn Si Na K B Mo Ni Ag Ti Sb Ca Mg Zn P Ba
0 2 0 1 1 0 5 0 2 86 1 0 2 0 1 2596 556 1444 1252 0
ST OXI NIT SUL W A V100 TBN ISO
0 0 0 0 N N 15.0 12.0 17/14
5μ 10μ 15μ 20μ 25μ 50μ 75μ 100μ
1000 217 101 61 43 22 18 13
--------------------------------------------------------------
Here is the UOA after the 14hr race:
Cu Fe Cr Al Pb Sn Si Na K B Mo Ni Ag Ti Sb Ca Mg Zn P Ba
7 14 0 5 3 1 41 42 1 89 16 2 0 0 0 1469 792 1198 1094 0
ST OXI NIT SUL W A V100
0 15 10 18 T N 11.7
---------------------------------------------------------------
Unfortunately I forgot that the TBN test was extra and don't have a TBN for the UOA.
The UOA report notes "TRACE LEVELS OF WATER DETECTED. SODIUM LEVEL IS ELEVATED. NO GLYCOL DETECTED. SILICON AND
ALUMINUM LEVELS ARE ELEVATED AND MAY INDICATE DIRT ENTRY. INSPECT FOR SOURCE OF DIRT ENTRY INTO THE SYSTEM."
I'm new to UOA. Anything else here jump out to you guys as concerning? OK to run another 14hr race with this oil as-is?