Running problems

[hog68]

Hi

I have a 1999 XKR convertible with ( i believe) the original Nikasil engine. Mileage appears to be a genuine 76,000. Due to poor running and misfiring at 75,000 i had the supercharger hoses and gaskets replaced at a total cost of £350. All ran fine for 1000 miles ( 3 months) and then the same happened again last week only this time the car stopped altogether. I am advised that oil is carrying over into the supercharger probably from wear in the Nikasil bores/ broken rings and then contaminating/ breaking down the supercharger seals.
I have seen the evidence of this on the old seals. The oil level had dropped slightly on the dip stick and i had driven the car fairly hard on short journeys.Another repair of £350 and all is running ok, although there is a slight petrol smell. Is engine replacement the only answer, or if warmed up correctly and driven more lightly could all be ok ?

Any advice greatfully received.

Hog 68