Go for the full syn oils used in VW Tdi's

Especially the ones recommended for the PD motors.

VW spec 505.01 I believe. Lots of zinc to protect the cam driven injectors.

There are also zinc additives. ZDDP is one

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87' 300DT (Grey w/ red leather)
87' 300TDT (silver w/ palamino tex) SOLD

2012 VW JSW TDI (on tdiclub.com all the time "btcost")