Spent £500 on it in the last 3 months.

Using the Omega for work instead costs an extra £85 per month in fuel. Although taking clit tax / insurance / MOT costs into account thats probably nearer £70 I suppose. Plus, If I start using the Omega as my daily, things will start to wear out / go wrong with it.
It has 193000 on the clock, although well maintained and plenty of parts replaced. Still an old high mileage car though.
Even if I sold the Boxster for say £3000, and bought a commuting car, it could easily turn out to be a heap of shite.
No guarantee of a good car for that kind of money these days.
If I do scrap it I will pull the new turbo, new injector and cat off first and flog them separately.
Seems crazy for the sake of not being able to get a cam seal to do its job, but Im running out of ideas.
Breather system has all been thoroughly cleaned so it shouldnt be that.
Possibly worn / stuck rings ?