Polo/A1 TDI (yay or nay)?

[Transporter]

My average drive is highway and freeway driving 10-30kms average mostly doing 80kmh


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More than enough for the DPF to regenerate. We have 2 Tiguans TDI that do no more than 18 km city trip one way and in 10years never had an issue with the DPF.

[tyr382]

So other then dpf and egr issues
Any other known issues like carbon buildup like the FSI engines ?


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[Lucas_R]

The DPF regens must vary wildly from one model to another because my SQ5 takes a good 15 mins just to get oil and water up to temp and then it only starts a regen when its at 100% full (not a 98 or 99%, only 100%) and then takes a good 20-25mins to do a full regen.

Too be honest its an absolute pain in the arse and the car never does a regen when you want it to (eg we went to Sydney a few weeks ago, perfect conditions for a regen and the DPF was 82% full when we left. The DPF finally reached 100% when we were about 5 mins from home in stop/start traffic....bloody useless. So i had to drive around needlessly until the regen finished instead of going home).

I’ll never buy another diesel.

[tyr382]

I get the consensus it’s a problem in most of the larger engines. It’s hard to find issues for anything 1.6 and lower, am I wrong ?


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[Transporter]

I get the consensus it’s a problem in most of the larger engines. It’s hard to find issues for anything 1.6 and lower, am I wrong ?


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Which could indicate you that vast majority don’t have any problems, and it indicates me that the hysteria about the DPF from the early days more than a decade ago is still alive. FYI, in most cases, the early days DPF failures were caused by faulty DPF pressure sensors and the drivers who ignored the check engine light for too long. Despite it was relatively quickly resolved, the stories are still used by car salesmen.

[tyr382]

The DPF regens must vary wildly from one model to another because my SQ5 takes a good 15 mins just to get oil and water up to temp and then it only starts a regen when its at 100% full (not a 98 or 99%, only 100%) and then takes a good 20-25mins to do a full regen.

Too be honest its an absolute pain in the arse and the car never does a regen when you want it to (eg we went to Sydney a few weeks ago, perfect conditions for a regen and the DPF was 82% full when we left. The DPF finally reached 100% when we were about 5 mins from home in stop/start traffic....bloody useless. So i had to drive around needlessly until the regen finished instead of going home).

I’ll never buy another diesel.

You can do the regeneration process Stationary


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[Lucas_R]

You can do the regeneration process Stationary

Id rather not choke on the stench too be honest. There's a very strong smell that comes from the exhaust when its doing a regen and its not pleasant. That and the fact that the DPF gets very hot during the regen process much prefer knowing the air moving over the DPF will help minimise a fire situation if that ever happened.

[tyr382]

This is why we need synthetic fuels!!!!

If all diesels ran on a synthetic diesel with no sulphur content, there be no need for a DPF or even an EGR system.

What ever happened to Audi’s “Blue crude”
It’s like they had the answer to the whole diesel gate scandals, but not one word on something that would of solved the whole problem.
I always thought that this would of been the real opportunity to promote a clean, carbon neutral fuel.

Volkswagen engines are not the problem, the problem is the fuel it’s self.


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