I have this up on R3V as well. Thought this might prove interesting for the E30 owners here... my car is a DD.
Well, I'm just a few months shy of 4 years of E30 ownership - 45 months in total.
Including the cost of the car ($2000), I've spent $30,344.11 and I have driven just over 226,669 km. I'm just over 1000 km from equaling to distance driven by the previous owners - took them 27 years... I've driven this distance in under 4!!! I'm averaging over 60K km per year.
Updated numbers (from the 25 month mark):
6% was cost of the car (-4%)
61.9% of my expenses has been fuel ($18,595.88 - +5.9%)
34% has been servicing, repairs and expenses. This figure includes regular maintenance, repairs, insurance, and licensing fees. (11,748.23 - +4%)
Gas on average has cost me $413/month. My average fuel economy has been 7.795L/100 km (30.17/36.23 MPG US/UK). I didn't post those numbers last time, but they have stayed pretty constant all along. For reference my lowest number has been 6.298L/100 km (37.35/44.85 MPG US/UK) and highest was 9.878L/100 km (23.81/28.60 MPG US/UK).
If I tally the cost of the car, and servicing/expenses, I come out to $305.51/month or just under $68/week. From my last numbers this has been a drop of 15%. One of the drops in expenses has been insurance. I started at over $85 per month (liability only, no comp or collision) and am now at just over $61. (over 25% reduction)
Total cost of ownership per day is $23.13 and per km $0.142.
Since my initial post, my largest expense in servicing was my front suspension (strut inserts, mounts, control arms/ball joints, tie rods) and full brake refresh (remanufactured calipers, pads, rotors, soft lines, brake fluid). This was last November at a cost of about $1200 (labour was DIY). I've been averaging a timing belt job every 18 months.