This is my first and last UOA with M1 5w30 SuperSyn (not EP). All the analyses had been done by WearCheck Canada in Mississauga. The engine is 4-cyl DOHC, chain- driven cams. The oil had been in use for four month, from Nov 10, 2005 to March 11, 2006. There were no temperature extremes this winter, unlike last year's OCI on GC. No oil makeup during either OCIs. LC every 1000mi. Amsoil SDF-10 oil filter. Stock paper air filter, changed about 30k km ago. I drive about 70% highway at as low speed as possible, under 100km/h. I am very light on throttle. Prior to this run I've had two 5k km runs on the same oil.
code:I have to call WearCheck to find out why they performed TAN instead of TBN analysis. May be that's because the oil already became acidic and was pretty much shot before I changed it? I think I'm done with M1. I realize that the chemistry is very different with GC, and I don't mind a change in additive elements distribution. Although increased numbers for Al and Pb (but not iron) does not impress me very much. Although copper decreased... These numbers are rather small, but I'd like them to be within GC performance range. Then again, this TAN instead of TBN. The viscosity @100C is right on the money which makes me wonder... Did it shear down and then thicken up? I know, too much BITOG reading Interesting that this UOA did not show elevated iron. I thought it was M1's signature. I'm done with M1 after current run (for 5k km, no more) because it did not provide any advantage over green GC which I have plenty of. The engine has been noticeably nosier, particularly when cold. Somehow my confidence in M1 protection for valvetrain and bearings diminishes. Next thing will be Havoline 5w30 in fall. I got 8 bottles for free with PartSource coupon, and I'm very curious about its performance. Update: I've just talked to the lab, and the technician puzzled me with his reply why he performed TAN instead of TBN. He said that TBN means nothing for gasoline engine oil and any direct comparison with my previous UOA is useless. Makes me wonder... [ March 15, 2006, 02:31 PM: Message edited by: yugrus ]Oil M1 5w30SS GC GC GC Sample Date 3/11/2006 6/18/2005 2/26/2005 12/30/2004 Unit Age 74713k 50000k 40000k 30200k Component Age 74713k 50000k 40000k 30200k Time on Fluid 9766k 10000k 5000k 5000k Time on Filter 9766k 10000k 5000k 5000k Fluid Maint Changed Changed Changed Changed Filter Maint Changed Changed Changed Changed Wear NORMAL NORMAL NORMAL NORMAL Contamination NORMAL NORMAL NORMAL NORMAL Fluid ATTENTION NORMAL NORMAL NORMAL Iron (Fe) 4.1 4 3.2 3.4 Chromium (Cr) 0.2 0 0.2 0.1 Nickel (Ni) 0 0 0 0 Titanium (Ti) 0.1 0 0.1 0.1 Silver (Ag) 0.1 0 0.3 0.3 Aluminum (Al) 3.6 1.6 2.1 1.7 Lead (Pb) 2.2 0.2 1 0.1 Copper (Cu) 2 5.8 4.2 3.8 Tin (Sn) 0 0 0 0 Silicon (Si) 7 6.8 5.5 5.7 Sodium (Na) 4.2 0.5 1.8 0.6 Potassium (K) 0.3 0 0.6 0 Boron (B) 97 0.9 3.3 5.4 Barium (Ba) 0.1 0 0.2 0.2 Molybdenum (Mo) 59 0.3 0.7 2.1 Magnesium (Mg) 16 118 119 117 Calcium (Ca) 2488 2620 2771 3010 Phosphorus (P) 736 670 733 771 Zinc (Zn) 799 817 874 891 Sulfur (S) 1852 2601 2846 2654 Manganese (Mn) 0.9 1.2 1.3 1.6 Vanadium (V) 0.1 0 0.1 0 Oxid(PA) 68 56 50 53 Nitr(PA) 53 40 36 36 Sulf(PA) 74 41 38 49 TAN 2.91 TBN 4.63 [email protected]°C 10 11.6 12.1 12.4 White Metal NONE NONE NONE NONE Babbitt NONE NONE NONE NONE Precipitate NONE NONE NONE NONE Silt NONE NONE NONE NONE Debris NONE VLITE NONE NONE Dirt NONE NONE NONE NONE Appearance NORML NORML NORML NORML Odor NORML NORML NORML NORML H2O(Emul) NEG NEG NEG NEG H2O(Free) NEG NEG NEG NEG