[Perfectlap]

Originally Posted by haz

AFAIK.. and have documentet in the service manual... these are the oil changes as far back as the story books that came with the car can confirm:

Date........KM
24.07.13..158.000 / 98K miles
16.05.11..142.688 / 88k miles
06.05.08..118.584 / 74K miles
16.08.06..106.280 / 66K miles
12.10.05..97.354 / 60K miles
11.03.03..79.477 / 49K miles
09.07.02..54.023 / 33K miles
23.07.01..41.700 / 26K miles
23.10.00..23.151 / 15K miles

Most likely there have been more oil changes than this, as the services above include more than just the oil changes.

I had to add the intervals in miles to see it better. Were these Mobil1 oils? It looks like you're missing records for at least 8 oil changes in the first 88K miles/142KMs to get the average mileage between oil changes down to 5K miles.