I have a Mk7 GTI with high mileage- around 155K miles. Recently it’s been using a load of oil - around 1 Litre per 600 miles. No obvious leaks )had a new steel sump fitted recently- runs great - no smell of oil etc . How can I tell if it’s faulty piston rings , valve seals or the PCV valve ? It always used a small amount but over the last few weeks it’s gone higher- any help appreciated…
600 miles doesn't sound right.
My GTD consumes more oil than any other car I've owned. I need a top up bottle every 3-5000 miles. The day after I bought the car (at 44000 miles) I drove it to Spain non stop approx 1500 miles. I needed to top up around 1200 miles into the trip, I sh!t myself when the oil light came on 1200 miles from home thinking it was an engine failure

. It had a full service and oil change when I bought it the day before. I saw them doing it as the dealership is owned by a family friend and I requested Castrol oil in the deal, so they bought the 5 litre bottle from Halfords

Apparently, they get worse with age