Agree, use good quality oil and change twice a year, as for oil usage my sportwagon uses much less than 30mls
every 6 months, and it is used daily and regularly rev past 5000, now on 55,000 miles and still pulls very well.
My Gtv is used once or twice a month and after owning it for nearly a year has been topped up once no more
than 50mls, and is on 65,000 miles, not all twinsparks burn oil...it's the luck of the draw it seems...
Thats using 5w/ 40 fully synthetic with no additives.
I think full history is vital and least amount of owners is important, pref female....