heated windscreen in my defender is by far one of the most used and valued mods, given the lack of warm air to the windcreen in winter. It makes the car much more drivable in winter when you can actually see where your going :)

oil = black smoke ?

not sure but im topping up often. I'm living with it as it drives really well

ye it was, the new one is a VGT whichis nice to drive i have to say. It drives nice just smells oily

i'm wondering if its the oil itself as i use fully synthetic, legend has it it makes old cars leak but i doubt it

Gutted. Out of ideas now as to what this could be. You've literally tried everything. For sure oil is getting through the turbo and into the intake as to why that is nobody knows as the turbo is new, oil pressure is fine, correct oil, correct oil temperature, good oil return. If it's any...

try and see if the current cat is blocked. It'll be interesting to see if this is the cause if not i'll feel bad about saying it as you've spent quite a bit

definitely a possibility then. I'd de-cat it you know.

blimey. Wouldn't it be best to check if it is blocked first. Fair play to you though. Might be an old rag down there

blocked DPFs are more prevalent but amount to the same problem of exhaust back pressure. Have a read https://www.melett.com/technical/why-turbos-fail/can-dpf-cause-turbo-failure/ " Oil leaks into the compressor housing can be seen as a consequence of exhaust gas forcing its way into the CHRA...

pressure on the exhaust side pushes through into the cold side of the turbo. I was reading how blocked DPF's can knacker turbos and this was a way.

Have you considered that maybe you have excessive back pressure in the exhaust ? that can cause the turbo to leak oil. the 300tdi have a Catalytic converter and maybe yours is blocked. I dunno, you've tried everything else ight be worth having a look.

invest the 30k in solar panels for your house instead.

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are you completely sure there are no boost leaks ? low pressure , with everything you've done in mind would point to that.

price ?

Id retard the engine significantly to see if the problem sorts itself out whilst trying to replicate the previous problems. Won't do any harm to try anyway.

how about this, regulate the oil pressure and be done with it ?? https://www.turbosmart.com/product/opr-t40-40psi-black/

well caught. on the timing belt, is there a way to inspect it without taking the whole cover off, as id like to check mine. Thanks :)