Oil Brand/Weight : M1 0w-40
Type Equipment : VW Jetta 1.8L T
Miles/Hours on oil : 6004
Total Miles/Hours : 55451
Results ppm/% Comments (blank=normal)
Wear
Copper 3
Iron 14 5w-30 SS showed slightly lower wear rate
Chromium 0
Lead 0
Aluminum 2
Silicon 9 Airfilter works well still.
Tin 0
Additives
Molybdenum 57
Sodium 8
Magnesium 40
Zinc 668
Potassium 0
Phosphorus 583
Calcium 1920
Physical Properties
Water negative
Fuel negative scale negative,trace,positive
Antifreeze negative
Soot 0 no solids
Oxidation 41 scale 0-199 20.5 %,almost doubled from normal.
Nitration 73 scale 0-199 36.5 %,higher than normal,cold weather
affecting
Sulfur 25 fuel sulfur
TBN 8 normal for miles driven
Vis@100 C 12.1 thinned to 30w.
Final Comments : All engine wear normal to low. The oil thinned out of
grade but wear not affected. Engine and oil working well together. Nox continues up with cold weather influencing that increase. Oxidation is beginning to be influenced by Nox level. No solids showing up so inside of engine is remaining clean. Nox,oxd,and vis shear only things keeping me from recommending a longer
drain.
Compare to 5W30 analysis here: http://forums.vwvortex.com/zerothread?id=487466
Note that the 5W30 SS was used almost exclusively on the highway, in the summer. This 0W-40 sample was used almost exclusively in short trips, colder weather, and a lot of traffic jams, and for almost 1500 miles more. I was hoping for single digit metal wear across the board, but no luck. OEM filter as always.
The shearing to 12.1 Cst is not surprising under the conditions. Oil often was not up to temp when shut down most of the time, so mechanical shearing effect outweighed the smaller molecules vaporing off.
Type Equipment : VW Jetta 1.8L T
Miles/Hours on oil : 6004
Total Miles/Hours : 55451
Results ppm/% Comments (blank=normal)
Wear
Copper 3
Iron 14 5w-30 SS showed slightly lower wear rate
Chromium 0
Lead 0
Aluminum 2
Silicon 9 Airfilter works well still.
Tin 0
Additives
Molybdenum 57
Sodium 8
Magnesium 40
Zinc 668
Potassium 0
Phosphorus 583
Calcium 1920
Physical Properties
Water negative
Fuel negative scale negative,trace,positive
Antifreeze negative
Soot 0 no solids
Oxidation 41 scale 0-199 20.5 %,almost doubled from normal.
Nitration 73 scale 0-199 36.5 %,higher than normal,cold weather
affecting
Sulfur 25 fuel sulfur
TBN 8 normal for miles driven
Vis@100 C 12.1 thinned to 30w.
Final Comments : All engine wear normal to low. The oil thinned out of
grade but wear not affected. Engine and oil working well together. Nox continues up with cold weather influencing that increase. Oxidation is beginning to be influenced by Nox level. No solids showing up so inside of engine is remaining clean. Nox,oxd,and vis shear only things keeping me from recommending a longer
drain.
Compare to 5W30 analysis here: http://forums.vwvortex.com/zerothread?id=487466
Note that the 5W30 SS was used almost exclusively on the highway, in the summer. This 0W-40 sample was used almost exclusively in short trips, colder weather, and a lot of traffic jams, and for almost 1500 miles more. I was hoping for single digit metal wear across the board, but no luck. OEM filter as always.
The shearing to 12.1 Cst is not surprising under the conditions. Oil often was not up to temp when shut down most of the time, so mechanical shearing effect outweighed the smaller molecules vaporing off.
