VW 502/505 is based on ACEA "A3" standards for gas engines and the older CMCC "PD-2" standards for diesel engines and also includes the following tests in VW engines:
The VW cam and tappet test, "PV5106" is run in the 1.6L IDI diesel engine. The VW T-4, "PV1449" test is run in the 2.0L Vw gas engine.
VW C+T/PV5106
Test Parameter Test Limit
Applied Load - 1800 Newtons
Scuffing - None allowed
Max Tappet Pitting - 20 microns
Max Cam Pitting - 20 microns
Max Tappet Wear - 100 microns
Max Cam Wear - 75 microns
VW T-4/PV1449 - test duration is 248 hours and no makeup oil is allowed during this test. VW T-4 is considered to be a very severe test for oxidation and thickening....
EOT Kinematic Viscosity @ 40C - 194 Cst max
Viscosity Increase @ 40C - 121% max
EOT TBN, mg KOH/g - 4.7
Ring Stick - none allowed
Piston Merit - 1.0 minimum
Note: "EOT" = End of Test
I should add that VW 502/505 requires a HT/HS viscosity for new oil of at least 3.5 Cp @ 150C/302F. However there is NO requirement to measure this parameter after the test is run.
The VW cam and tappet test, "PV5106" is run in the 1.6L IDI diesel engine. The VW T-4, "PV1449" test is run in the 2.0L Vw gas engine.
VW C+T/PV5106
Test Parameter Test Limit
Applied Load - 1800 Newtons
Scuffing - None allowed
Max Tappet Pitting - 20 microns
Max Cam Pitting - 20 microns
Max Tappet Wear - 100 microns
Max Cam Wear - 75 microns
VW T-4/PV1449 - test duration is 248 hours and no makeup oil is allowed during this test. VW T-4 is considered to be a very severe test for oxidation and thickening....
EOT Kinematic Viscosity @ 40C - 194 Cst max
Viscosity Increase @ 40C - 121% max
EOT TBN, mg KOH/g - 4.7
Ring Stick - none allowed
Piston Merit - 1.0 minimum
Note: "EOT" = End of Test
I should add that VW 502/505 requires a HT/HS viscosity for new oil of at least 3.5 Cp @ 150C/302F. However there is NO requirement to measure this parameter after the test is run.