2003 BMW 330 Ci differential UOA
Date: 08-05-2005
Miles on sample: 38000
Dates: from Feb 2003 to August 2006
Lab: Blackstone
Factory fill – probably Castrol SAF-XO 75w-90
This sample looks good. The universal averages column shows typical wear from a differential after about 60,000 miles. You changed the oil, though it probably could have stayed in use longer. Metals all read below averages and show no problems at all. Insolubles (solids) were low at 0.1% which is great. No moisture or other contaminants found. The viscosity was normal for a 75W/90 oil. We think you’ll be able to leave the next oil in place longer than 38K miles unless BMW calls for it to be changed to keep the warranty valid.
My comments:
The car has 2 trips to the drag strip for a total of about 8 runs, two track days and about 10 Auto cross events. I changed to Motul Gear 300 75w/90. I chose it because it starts a little thinner than most other gear lubes, is full synthetic and has a high Viscosity index giving a lower viscosity at lower temps.
Calculator link : http://www.geocities.com/CapeCanaveral/3655/VI.html
Date: 08-05-2005
Miles on sample: 38000
Dates: from Feb 2003 to August 2006
Lab: Blackstone
Factory fill – probably Castrol SAF-XO 75w-90
Lab Comments:code:
Universal Averages
Aluminum 0 8
Chromium 1 2
Iron 240 322
Copper 2 15
Lead 0 7
Tin 3 1
Molybdenum 0 5
Nickel 0 3
Manganese 10 7
Silver 0 0
Titanium 0 0
Potassium 1 6
Boron 216 128
Silicon 7 61
Sodium 4 15
Calcium 7 585
Magnesium 3 60
Phosphorus 1452 1118
Zinc 6 326
Barium 3 19
SUS Viscosity @ 212 74.5
Flashpoint F 410
Water % 0.0
Insolubles % 0.1
This sample looks good. The universal averages column shows typical wear from a differential after about 60,000 miles. You changed the oil, though it probably could have stayed in use longer. Metals all read below averages and show no problems at all. Insolubles (solids) were low at 0.1% which is great. No moisture or other contaminants found. The viscosity was normal for a 75W/90 oil. We think you’ll be able to leave the next oil in place longer than 38K miles unless BMW calls for it to be changed to keep the warranty valid.
My comments:
The car has 2 trips to the drag strip for a total of about 8 runs, two track days and about 10 Auto cross events. I changed to Motul Gear 300 75w/90. I chose it because it starts a little thinner than most other gear lubes, is full synthetic and has a high Viscosity index giving a lower viscosity at lower temps.
Comparison of viscosity (cSt) of Motul and redline at different temps:code:
Lubes I considered:
Motul 300 Motul Castrol Mobil 1 Red Line Castrol
MotylGear SAF-XO Syntec
API GL4 GL5 API GL4 GL5 API GL5 API GL-5/MT-1 GL5+ API GL-5/MT-1
MIL-L-2105D MIL-L-2105D
Vis 40C 72.6 81 103.7 106 115
Vis 100C 15.2 14.5 15.7 15.2 16.4 15.0
VI 222 188 162 150 155
Pour pt C -60 -48 -51 -46 -45
Flash Pt C 200 200 220 175 227 198
Calculator link : http://www.geocities.com/CapeCanaveral/3655/VI.html
code:
Motul Redline
0 F 1292 5491
30 F 453 1288
60 F 194 411
90 F 96.5 164
120 F 54.3 78.6
150 F 33.4 42.7