This was drawn from my 2022 Hyundai Tucson hybrid at 2800 miles because I had a slowly rising oil level and suspected fuel dilution. I did not smell any fuel on the dipstick, though, and my fuel economy was pretty good. I wanted to quantify the amount of fuel dilution if possible. Caterpillar SOS was the lab and they will perform fuel dilution if you ask for it. I asked, but said they are unable to determine fuel dilution in gasoline engine oils--only diesel engine oils. This is factory-fill oil which I presume is 0w-20 since that is what is recommended in the manual.
Miles on vehicle 2800
Miles on oil 2800
Date July 7 2021
Cu 16
Fe 18
Cr 0
Al 4
Pb 99
Sn 0
Si 104
Na 4
K 16
Mo 856
Ni 0
Ag 0
Ti 0
V 0
Mn 3
Cd 0
Ca 1130
P 830
Zn 776
Mg 454
Ba 13
B 130
V100 7.3
ST 0
OXI 15
SUL 24
NIT 6
W No
A No
The lab flagged Si and Pb. I don't think Si is a problem but the Pb is more than an order of magnitude higher than I expected. I don't think fuel dilution is a problem since viscosity is OK and oxidation is reasonable. Also, I ran a bottle of Chevron Techron Concentrate in the tank and my fuel economy picked up about 3mpg and the rising oil level problem seems to have stopped. It will take a few thousand miles to determine this for sure. Anyway, the Pb count has made me forget all about the fuel dilution. The lab thinks its bearing overlay wear. They may be right, however most overlay alloys are PbSn or PbSnCu. We have no Sn here. It could be PbCu alloy.
It would be very helpful if I could find a few more 1.6L turbo gdi Hyundai or Kia engine oil analysis results to help put this in perspective. Let me know if you know of any. Thanks.
Miles on vehicle 2800
Miles on oil 2800
Date July 7 2021
Cu 16
Fe 18
Cr 0
Al 4
Pb 99
Sn 0
Si 104
Na 4
K 16
Mo 856
Ni 0
Ag 0
Ti 0
V 0
Mn 3
Cd 0
Ca 1130
P 830
Zn 776
Mg 454
Ba 13
B 130
V100 7.3
ST 0
OXI 15
SUL 24
NIT 6
W No
A No
The lab flagged Si and Pb. I don't think Si is a problem but the Pb is more than an order of magnitude higher than I expected. I don't think fuel dilution is a problem since viscosity is OK and oxidation is reasonable. Also, I ran a bottle of Chevron Techron Concentrate in the tank and my fuel economy picked up about 3mpg and the rising oil level problem seems to have stopped. It will take a few thousand miles to determine this for sure. Anyway, the Pb count has made me forget all about the fuel dilution. The lab thinks its bearing overlay wear. They may be right, however most overlay alloys are PbSn or PbSnCu. We have no Sn here. It could be PbCu alloy.
It would be very helpful if I could find a few more 1.6L turbo gdi Hyundai or Kia engine oil analysis results to help put this in perspective. Let me know if you know of any. Thanks.