Cheers gents. I have only owned the car for a couple of months, had to top up once (a small amount) and then had oil top ups included in checks I've had done, so haven't got into a routine. My commute is 28 miles, lots of smooth M1 driving (ahem) and the roundabouts of Milton Keynes.
I've had so many plans for mods to the Z (largely cosmetic), would you guys suggest saving the money for a rebuild/new engine instead, or tolerate additional top ups/changes?