As part of the 60,000 mile service on my 2003 Lexus GS-430 (which I actually performed a bit early), I had the Engine Oil, Transmission Fluid, Antifreeze, and Differential oil analyzed. This posting is on the results for the engine.
The most recent results are on the far right. I was expecting this UOA to be worse than the preceding ones, because the type of driving during this interval changed markedly from previous UOA intervals. Previously, I used the car for a fairly long commute, with the engine being thoroughly warmed up each time. This UOA reflects a new commute that is only about 6 miles, so the oil didn't get warmed up each time. It took me about 8 months to go 4,274 miles! Despite this severe service, I think my results are still excellent. Comments?
Brand: Mobil1 SS SL Mobil1 SS SL Mobil1 EP SL Mobil1 EP SL Mobil 1 EP SM
Weight 5W-30 5W-30 5W-30 5W-30 5W-30
Unit Miles: 10,002.0 15,007.0 37,682.0 45,263.0 56,775.0
Oil Miles: 5,000.0 5,005.0 7,556.0 7,581.0 4,274.0
Sample Date: 07-28-04 10-28-04 09-14-05 06-03-06 11-10-07
Oil Filter: Lexus 90915-20004 M1 M1-102 M1 M1-209 M1 M1-209 M1 M1-209
--------------- ----------------- -------------- ------------- -------------- --------------
Iron: 14 9 7 5 6
Chromium: Nickel: Aluminum: 5 Lead: Copper: 5 1 Tin: Silver: Titanium: Silicon: 59 22 15 2 16
Boron: 220 225 216 171 73
Sodium: 14 12 11 22 18
Potassium: Molybdenum: 121 93 88 85 103
Phosphorus: 1186 994 1036 967 733
Zinc: 1514 1054 1096 1298 849
Calcium: 3070 3217 2706 2618 2606
Barium: Magnesium: 34 33 31 22 15
Antimony: Vanadium: 1 2 1
Oil Added: None None None None None
Fuel % Vol: Water % Vol: Vis CS 100C: 10.4 11.0 11.0 10.8 10.2
SAE Grade: 30 30 30 30 30
Glycol Test: Negative Negative Negative Negative Negative
TBN[C] D2896: 6.56 7.52 6.14 5.45 5.59
Flash Point, COC[F]: N/R N/R N/R 428 N/R
Total Solids: N/R N/R N/R N/R 0.2
The most recent results are on the far right. I was expecting this UOA to be worse than the preceding ones, because the type of driving during this interval changed markedly from previous UOA intervals. Previously, I used the car for a fairly long commute, with the engine being thoroughly warmed up each time. This UOA reflects a new commute that is only about 6 miles, so the oil didn't get warmed up each time. It took me about 8 months to go 4,274 miles! Despite this severe service, I think my results are still excellent. Comments?
Brand: Mobil1 SS SL Mobil1 SS SL Mobil1 EP SL Mobil1 EP SL Mobil 1 EP SM
Weight 5W-30 5W-30 5W-30 5W-30 5W-30
Unit Miles: 10,002.0 15,007.0 37,682.0 45,263.0 56,775.0
Oil Miles: 5,000.0 5,005.0 7,556.0 7,581.0 4,274.0
Sample Date: 07-28-04 10-28-04 09-14-05 06-03-06 11-10-07
Oil Filter: Lexus 90915-20004 M1 M1-102 M1 M1-209 M1 M1-209 M1 M1-209
--------------- ----------------- -------------- ------------- -------------- --------------
Iron: 14 9 7 5 6
Chromium: Nickel: Aluminum: 5 Lead: Copper: 5 1 Tin: Silver: Titanium: Silicon: 59 22 15 2 16
Boron: 220 225 216 171 73
Sodium: 14 12 11 22 18
Potassium: Molybdenum: 121 93 88 85 103
Phosphorus: 1186 994 1036 967 733
Zinc: 1514 1054 1096 1298 849
Calcium: 3070 3217 2706 2618 2606
Barium: Magnesium: 34 33 31 22 15
Antimony: Vanadium: 1 2 1
Oil Added: None None None None None
Fuel % Vol: Water % Vol: Vis CS 100C: 10.4 11.0 11.0 10.8 10.2
SAE Grade: 30 30 30 30 30
Glycol Test: Negative Negative Negative Negative Negative
TBN[C] D2896: 6.56 7.52 6.14 5.45 5.59
Flash Point, COC[F]: N/R N/R N/R 428 N/R
Total Solids: N/R N/R N/R N/R 0.2