100,000km has always been my interval on Platinum.
iridium depends on the electrode diameter - some are 60k, others 100k (can't remember which - thin = 60k?).
It also depends on the way the car is driven, engine tune etc.
IMO, part of why Subaru has 50k intervals is because the spark plugs tend to seize in the 2 back cylinders if left for 100k. OTOH, Subaru are happy for the auto trans fluid to stay in for 100k & it is absolutely fubar by then.
I guess it comes down to observation of what you find when carrying out the service & adjusting the service practices accordingly.
Umai Naa!! I believe you are no longer involved in VW dealerships but has anyone ever reported back to VW/Skoda/Audi that the books are wrong? It's been 5 years since I bought mine & they still say the same thing. Part of my job is proof reading, editing & updating service manuals. I let some pretty crap English through (WTF do they teach at school these days?) but generally the engineers can get the service schedule right.
carandimage The place where Off-Topic is On-Topic
I used to think I was anal-retentive until I started getting involved in car forums
Performance Tunes from $850Wrecking RS OCTAVIA 2 Link
The books are very generalised. Basically, a one-size-fits-all English version. Has always been the case.
The dealers are given carbon-copy checklists which serve purpose as a service schedule. There are three different types, Passenger, Commercial, Crafter. The customer should receive a ticked copy of this with their invoice.
These are updated maybe every 12-18 months.
'07 Transporter 1.9 TDI
'01 Beetle 2.0
Yep I've always been given a copy of the carbon checklist.
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