« Reply #6 on: 18 July 2019, 16:30 »
I have no experience with the stuff in VW’s but have around 40 vehicles parked in the yard at work that drink the stuff.
The lorries get through a fair bit but in the smaller vans a tankful lasts quite a while.
Although not pig pee anymore it can and does still leave a white crystal type residue if you spill it.
The exhaust needs to be properly hot for it to work and there’s minimal visible exhaust fumes when it’s woeking properly. Good for shiny tailpipes is think!

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