I run a rev up coupe and it has used approximately 0.5 of a litre of oil per 1000 miles from new and now at 27K, it is still using about the same amount. I have used Castol Edge, Castrol Magnatec and also the stuff that Nissan put in whatever that is, but is makes no difference to the consumption. Nissan have told me that up to 1 litre per 1000 miles is acceptable, so I just live with it. As for other cars, some RS4's and M3's (6 cylinder) also use a similar amount.