For those interested, here is my latest UOA with specifics listed below.
Lab used was Predictive Maintenance Services
Car: 2004 Jetta GL (PD)
Miles on car at time of sample: 110,490
Oil used: Mobil Delvac 1 5w40
The oil was in the engine from September 28th, 2006 until April 7th, 2007
Fuel used was almost exclusively BP #2 ULSD (plus 2 tankfuls of Sunoco B20)
4 ounces of Stanadyne Performance Formula were added at each fill up
Driving style: easy, with shifts between 2000 and 2500 rpms, and with fewer highway miles than previously driven.
Iron 57
Chromium 2
Lead 6
Copper 7
Tin 0
Aluminum 10
Nickel 1
Silver 0
Boron 21
Sodium 6
Potassium 6
Magnesium 322
Calcium 2617
Phosphorus 1143
Zinc 1260
Molybdenum 1
Fuel A
Water Glycol N
Visc @100c 14.5
TBN 7.52
Soot 0.4
Oxidation 15.00
Nitration 10.00
Comments from Predictive Maintenance Services:
"Mark:
Attached is the UOA for your vehicle. If this sample represents a 20K OIC,
then all is doing extremely well. TBN is surprisingly strong for this
mileage.
Wear levels and contamination appear normal. No corrective action indicated by tests performed. Continue normal PM and sample interval.
Thanks for continuing to choose AV Lubes and Predictive Maintenance for your
oil testing needs."
xxx xxxxxxxxxx
Chief Analyst
My comments:
The previous high number for FE was 68 at 40,259 miles.
I have run D1 in this engine since February 4th 2006, and for the last 50,000 miles.
This engine has a history of producing little soot, and TBN retention when using this oil has always been excellent. The oil remained solidly in the 40-weight range during this timeframe.
At 100k, (December, 2006) the timing belt was changed, and as part of that process, we removed the EGR valve and cam cover to have a look. Photos of the cam and rollers are posted in the photo section on TDIClub.com. It has since been checked again and there are no visible signs of wear. Nor can any wear be felt to the touch. The EGR valve was only slightly coked-up and the intake manifold was clean enough to require no action. The airbox was removed during the sampling timeframe and could explain the slightly elevated silicon level.
I had extended my OCI to 15k as a result of previous samplings.
This oil sample has 20,250 miles on it.
Lab used was Predictive Maintenance Services
Car: 2004 Jetta GL (PD)
Miles on car at time of sample: 110,490
Oil used: Mobil Delvac 1 5w40
The oil was in the engine from September 28th, 2006 until April 7th, 2007
Fuel used was almost exclusively BP #2 ULSD (plus 2 tankfuls of Sunoco B20)
4 ounces of Stanadyne Performance Formula were added at each fill up
Driving style: easy, with shifts between 2000 and 2500 rpms, and with fewer highway miles than previously driven.
Iron 57
Chromium 2
Lead 6
Copper 7
Tin 0
Aluminum 10
Nickel 1
Silver 0
Boron 21
Sodium 6
Potassium 6
Magnesium 322
Calcium 2617
Phosphorus 1143
Zinc 1260
Molybdenum 1
Fuel A
Water Glycol N
Visc @100c 14.5
TBN 7.52
Soot 0.4
Oxidation 15.00
Nitration 10.00
Comments from Predictive Maintenance Services:
"Mark:
Attached is the UOA for your vehicle. If this sample represents a 20K OIC,
then all is doing extremely well. TBN is surprisingly strong for this
mileage.
Wear levels and contamination appear normal. No corrective action indicated by tests performed. Continue normal PM and sample interval.
Thanks for continuing to choose AV Lubes and Predictive Maintenance for your
oil testing needs."
xxx xxxxxxxxxx
Chief Analyst
My comments:
The previous high number for FE was 68 at 40,259 miles.
I have run D1 in this engine since February 4th 2006, and for the last 50,000 miles.
This engine has a history of producing little soot, and TBN retention when using this oil has always been excellent. The oil remained solidly in the 40-weight range during this timeframe.
At 100k, (December, 2006) the timing belt was changed, and as part of that process, we removed the EGR valve and cam cover to have a look. Photos of the cam and rollers are posted in the photo section on TDIClub.com. It has since been checked again and there are no visible signs of wear. Nor can any wear be felt to the touch. The EGR valve was only slightly coked-up and the intake manifold was clean enough to require no action. The airbox was removed during the sampling timeframe and could explain the slightly elevated silicon level.
I had extended my OCI to 15k as a result of previous samplings.
This oil sample has 20,250 miles on it.