'96 Passat TDI 120905 miles
5W-30 HDD Installed Nov 03, still in service
OEM oil filter
AMSOIL foam air filter, serviced during period
No bypass filter
Recommended drain interval: 7500 miles
I used AMSOIL Power Foam to clean the upper cylinder and ring area in November, 03 when this oil was installed. Cleaning
It looks like I've made some progress, but there's more cleaning to go. Not unexpected - it took 72000 miles for petroleum oil to cause the mess, it won't clean quickly without opening the engine. I've gotten my hands on some Biodiesel and will begin using it in the fuel, and will use it for the next round of ring soaking sometime this summer when I hit my 18,000-mile oil change.
My fuel economy appears to be creeping up as the rings are cleaned as well. I've come from 39-41 early on to 43-49 now.
I'm extremely happy with the performance of this oil!
5W-30 HDD Installed Nov 03, still in service
OEM oil filter
AMSOIL foam air filter, serviced during period
No bypass filter
Recommended drain interval: 7500 miles
Makeup oil was down to 2.5 quarts for this 7400 mile period.code:
Jun 03 Nov 03 Mar 04
Miles on oil: 6660 14900 7415
Iron 46 41 38
Chrome 22 15 9
Lead 7 4 4
Copper 5 5 5
Tin 1 0 0
Aluminum 12 8 9
Nickel 0 0 0
Silver 0 0 0
Silicon 6 4 4
Boron 1 0 1
Sodium 3 6 4
Magnesium 36 21 25
Calcium 4178 4055 3949
Barium 0 0 0
Phosphorus 1255 1176 1188
Zinc 1446 1339 1300
Moly 2 0 0
Titanium 0 0 0
Vanadium 0 0 0
Potassium 0 0 0
Fuel 0 0 0
Vis@100C cSt 12.84 13.22 12.58
Water 0 0 0
Soot (%wt) .5 1.5 .4
Glycol 0 0 0
TBN 8.22 8.64 9.73
Oxidation 14.0 15.0 18.0
Nitration 11.0 12.0 15.0
I used AMSOIL Power Foam to clean the upper cylinder and ring area in November, 03 when this oil was installed. Cleaning
It looks like I've made some progress, but there's more cleaning to go. Not unexpected - it took 72000 miles for petroleum oil to cause the mess, it won't clean quickly without opening the engine. I've gotten my hands on some Biodiesel and will begin using it in the fuel, and will use it for the next round of ring soaking sometime this summer when I hit my 18,000-mile oil change.
My fuel economy appears to be creeping up as the rings are cleaned as well. I've come from 39-41 early on to 43-49 now.
I'm extremely happy with the performance of this oil!