Thanks Dave,
It was not overfilled by much, only a small bottle (less than 1 LTR) and i only put about two thirds in, i was very surprised it came above the level. (From previous cars i had). The guy i bought it from said the oil should be topped up from time to time, but the level has never dropped since i got it.
There has been no leaks or anything else unusual. The car has a six speed box so the revs are allways down at the low end.
Tks for the advice.