Just wanted to share my latest UOA. Oil used is PU 5W30 SN with Subaru OEM filter(Honeywell Blue Can).
IMO the oil is working pretty well with the engine. I'm planning on staying with current oil, and filter for future 7,500 mile OCI's. I will also stop the half interval samples as I feel that I've gotten sufficient trend info from previous samples. I will not be extending my oil changes past 7,500 miles to preserve my car warranty.
This car is my DD. My driving consists of 75/25 highway/city driving. 15-20 Minutes to work 1 way. Tons of mountain driving. Desert temperatures of 100+ summer and
Quote:
Blackstone's Comments:
This is a great report. This is one of the longest oil runs across the page yet metals are just about
as low as we've ever seen from your particular Subaru engine. Iron has been lower than this in the past, but
that was after shorter oil runs. We expect iron to accumulate in the oil as the oil sees more use, so really,
this reading of 12 ppm is excellent considering the nice, long oil run. The TBN shows some active additive
left at 2.4 since 1.0 is low. The TAN measured 5.0, which probably isn't too acidic at all. No coolant, water,
or fuel was found. Try 9,000 miles next.
Samples Dated: 05/04/12 and 10/23/11 are half interval samples to create trend. Oil and filter were not changed at time of sampling.
Code:
Miles on Oil ---------- 7,480 -------- 3,780 -------- 7,538 -------- 3,813 -------- 3,744 ----- 2,718 Universal
Miles on Unit 22,520 18,820 15,040 11,315 7,502 3,758 Averages
Sample Date 08/12/12 05/04/12 02/04/12 10/23/11 07/23/11 03/12/11
Make Up Oil added ------ 0Qts --------- 0Qts ------ 0.75Qts --------- 0Qts --------- 0Qts ------ 0Qts
Aluminum ------------------ 4 ------------ 4 ------------ 5 ------------ 4 ------------ 4 --------- 5 ----------- 4
Chromium 1 1 1 1 1 0 1
Iron 12 8 16 10 17 13 9
Copper -------------------- 6 ------------ 4 ------------ 8 ------------ 8 ------------ 8 --------- 7 ----------- 8
Lead 0 0 0 0 0 0 4
Tin 0 0 0 0 0 5 1
Molybdenum --------------- 52 ----------- 51 ----------- 64 ----------- 78 ---------- 109 ------- 247 ---------- 74
Nickel 1 0 1 1 0 0 0
Manganese 3 3 0 0 0 1 1
Silver -------------------- 0 ------------ 1 ------------ 0 ------------ 0 ------------ 0 --------- 0 ----------- 0
Titanium 2 2 2 3 3 0 0
Potassium 3 3 5 1 2 0 2
Boron -------------------- 51 ----------- 79 ----------- 34 ----------- 51 ----------- 62 -------- 21 ---------- 48
Silicon 6 4 8 8 10 18 11
Sodium 6 7 31 37 38 2 27
Calcium ---------------- 2175 --------- 2177 --------- 1155 --------- 1163 --------- 2678 ------ 2186 -------- 2083
Magnesium 101 104 639 608 19 11 305
Phosphorus 624 672 660 667 789 706 783
Zinc -------------------- 752 ---------- 754 ---------- 786 ---------- 774 ---------- 936 ------- 741 --------- 932
Barium 0 0 0 0 0 0 0
SUS Viscosity @ 210F --- 57.9 --------- 57.8 --------- 55.2 --------- 56.6 --------- 56.4 ------ 53.9
cSt Viscosity @ 100C 9.62 9.58 8.83 9.23 9.19 8.46
Flashpoint in F 400 385 405 395 385 400
Fuel % -----------------
Antifreeze % 0.0 0.0 0.0 0.0 ? 0.0
Water % 0.0 0.0 0.0 0.0 0.0 0.0
Insolubles % ------------ 0.3 ---------- 0.3 ---------- 0.3 ---------- 0.4 ---------- 0.2 ------- 0.2
TBN 2.4 3.6
TAN 5.0 5.0
ISO Code ---------- PU 5W30SN ---- PU 5W30SN -- M1EP 5W30SN -- M1EP 5W30SN -- M1EP 5W30SM -- MbilCln 5000 5w30SM
IMO the oil is working pretty well with the engine. I'm planning on staying with current oil, and filter for future 7,500 mile OCI's. I will also stop the half interval samples as I feel that I've gotten sufficient trend info from previous samples. I will not be extending my oil changes past 7,500 miles to preserve my car warranty.
This car is my DD. My driving consists of 75/25 highway/city driving. 15-20 Minutes to work 1 way. Tons of mountain driving. Desert temperatures of 100+ summer and
Quote:
Blackstone's Comments:
This is a great report. This is one of the longest oil runs across the page yet metals are just about
as low as we've ever seen from your particular Subaru engine. Iron has been lower than this in the past, but
that was after shorter oil runs. We expect iron to accumulate in the oil as the oil sees more use, so really,
this reading of 12 ppm is excellent considering the nice, long oil run. The TBN shows some active additive
left at 2.4 since 1.0 is low. The TAN measured 5.0, which probably isn't too acidic at all. No coolant, water,
or fuel was found. Try 9,000 miles next.
Samples Dated: 05/04/12 and 10/23/11 are half interval samples to create trend. Oil and filter were not changed at time of sampling.
Code:
Miles on Oil ---------- 7,480 -------- 3,780 -------- 7,538 -------- 3,813 -------- 3,744 ----- 2,718 Universal
Miles on Unit 22,520 18,820 15,040 11,315 7,502 3,758 Averages
Sample Date 08/12/12 05/04/12 02/04/12 10/23/11 07/23/11 03/12/11
Make Up Oil added ------ 0Qts --------- 0Qts ------ 0.75Qts --------- 0Qts --------- 0Qts ------ 0Qts
Aluminum ------------------ 4 ------------ 4 ------------ 5 ------------ 4 ------------ 4 --------- 5 ----------- 4
Chromium 1 1 1 1 1 0 1
Iron 12 8 16 10 17 13 9
Copper -------------------- 6 ------------ 4 ------------ 8 ------------ 8 ------------ 8 --------- 7 ----------- 8
Lead 0 0 0 0 0 0 4
Tin 0 0 0 0 0 5 1
Molybdenum --------------- 52 ----------- 51 ----------- 64 ----------- 78 ---------- 109 ------- 247 ---------- 74
Nickel 1 0 1 1 0 0 0
Manganese 3 3 0 0 0 1 1
Silver -------------------- 0 ------------ 1 ------------ 0 ------------ 0 ------------ 0 --------- 0 ----------- 0
Titanium 2 2 2 3 3 0 0
Potassium 3 3 5 1 2 0 2
Boron -------------------- 51 ----------- 79 ----------- 34 ----------- 51 ----------- 62 -------- 21 ---------- 48
Silicon 6 4 8 8 10 18 11
Sodium 6 7 31 37 38 2 27
Calcium ---------------- 2175 --------- 2177 --------- 1155 --------- 1163 --------- 2678 ------ 2186 -------- 2083
Magnesium 101 104 639 608 19 11 305
Phosphorus 624 672 660 667 789 706 783
Zinc -------------------- 752 ---------- 754 ---------- 786 ---------- 774 ---------- 936 ------- 741 --------- 932
Barium 0 0 0 0 0 0 0
SUS Viscosity @ 210F --- 57.9 --------- 57.8 --------- 55.2 --------- 56.6 --------- 56.4 ------ 53.9
cSt Viscosity @ 100C 9.62 9.58 8.83 9.23 9.19 8.46
Flashpoint in F 400 385 405 395 385 400
Fuel % -----------------
Antifreeze % 0.0 0.0 0.0 0.0 ? 0.0
Water % 0.0 0.0 0.0 0.0 0.0 0.0
Insolubles % ------------ 0.3 ---------- 0.3 ---------- 0.3 ---------- 0.4 ---------- 0.2 ------- 0.2
TBN 2.4 3.6
TAN 5.0 5.0
ISO Code ---------- PU 5W30SN ---- PU 5W30SN -- M1EP 5W30SN -- M1EP 5W30SN -- M1EP 5W30SM -- MbilCln 5000 5w30SM
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