WLTP Golf GTI Performance petrol particulate filter query

[monkeyhanger]

My 2015 R's tailpipe are absolutely black. My 2018 Polo GTI+'s are a little sooty. I'm amazed that some people here report their Golf GTI's tailpipe are clean (not dirty.enough between washes to notice, or never washed the tailpipe and they remained clean?

I suppose you have to put your foot down every once in a while to generate that soot, creating a rich cylinder mixture that doesn't fully combust. Maybe sootchucker's penchance for hypermiling doesn't give much scope to generate soot?  or frequent long distance travel gets the exhaust tips hot enough to burn the soot off?

[mcmaddy]

Mine are disgracefully black and sooty to the point where they no longer clean properly 

[Will2018]

I always suspected my car might have a GPF. Had it since June and the exhaust tips are still  pretty clean and the back doesn't get covered in soot. My previous direct injection turbo petrol car produced a lot of soot and had very black exhausts.

My car is a 7.5 GTi performance built in May 2018.

[dubber36]

Who remembers the good old days of 4 star petrol, when you had light grey 'soot' coating the inside of your tailpipe when it was running right?

[SRGTD]

Who remembers the good old days of 4 star petrol, when you had light grey 'soot' coating the inside of your tailpipe when it was running right?

I remember it well . And I can also remember paying around 75p a gallon (approx 16.5p a litre) for it too, back in 1977 when I got my first car. 

[Watts]

Who remembers the good old days of 4 star petrol, when you had light grey 'soot' coating the inside of your tailpipe when it was running right?

Yup! Too clean and it's running lean. Cue much fiddling with the carb and some swearing

[Sootchucker]

Well I certainly haven’t been hypermilling lately and been giving the car plenty of stick (hence the poor current mpg), but the tailpipes are still clean.

In fact even the insides of the mild steel pipes are pretty much spotless and I’ve never cleaned inside them    (excuse the dirt on the pipes - just general road grime)

[dubber36]

Yup! Too clean and it's running lean. Cue much fiddling with the carb and some swearing

Or a bit of trial and error twisting of the distributor.

[Watts]

Yup! Too clean and it's running lean. Cue much fiddling with the carb and some swearing

Or a bit of trial and error twisting of the distributor.

I was a constant fiddler with the timing and points and my old car did run rather well

[clarky92]

I have a March 2018 GTI PP (built December 2017) and my exhaust looks like Jim's with the filter. Probably find all 7.5 PP's have it.

My previous 7.5 non PP used to get sooty exhaust in a few days of use.

As previously stated, I guess the reason for no DSG farts on the PP 7.5 has been found.