Is it comming out if the top of the dipstick pipe ?
Than it could be, that you have to much pressure in the engine.
If your bearings are worn out, it may be that that tour engine builds up pressure. And then it could be that its oil is trown out true the dipstick.
Have had it on a Taunus TC1 (Cortina Mk3)
How old is your engine ? Has it been rebuild ?