Originally posted by harlie
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507.1 is the recommended oil for 'long life service'. However, Boettcher used 505.1 in my TDI Jetta for its initial 7,500 km service. But my 15,000 will be 507.1.
Without being too confusing, the specified oil for your car is probably 506.1.
507.1 has been developed for TDi engines with diesel particulate filters.

and let’s not drive that car.
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