[QUOTE=Artan;261933]Just a small correction Mr. Lowglider, Castrol Edge Turbodiesel 5W-40 isnt longlife (15000 km max or 12 months VW 505.01), Castrol Edge Turbodiesel 5W-30 is longlife (30000 km max or 24 months VW 507.00).
/QUOTE]
It has the BMW Longlife-04 approval, so even if VW does not use it for 30000kms, other manufacturers do and it is made to withstand it.
I wish you all the luck with your experiment and I think that if you check the oil`s pH and the engine for sludge regularly, it should be fine.
For all the nay sayers in Artan`s case:
A used oil actually has a better lubricity than a fresh one and his engine will be fine as long as the pH does not drop too far or too many large metal particles get in it. The oil he uses is very high quality and recommended for use up to 30000km and that is with the many incalculated tolerances to be kept on the safe side.
Artan if you go twice the mileage with your current oil, I`m willing to sponsor a laboratoy oil test.
Lots of folks who use oil lab tests use their oils way longer than the recommended factory intervals.
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