OK   the reason   I inquired  about the oil  was   because   I saw that it was low  after   getting the  "service"  warning light  was coming on  intermittently,  so that was the first  thing  i checked,    but    after   getting the correct oil    and bringing    up to the  correct level   the  " SERVICE "  light   is still  coming on   now and  again,   I remember this  happening   some time ago   then  it stopped  and hasn't been on   for months,  I service   my  own   car   so have you chaps   any  Idea  what  could be  causing this  before I take it to the garage ,  cheers