MikeS depends if it has been serviced regularly worth taking off cam cover and having a mooch around for carbon deposits etc
JohnnyN I've got some Forte flush to go in this weekend. Used it before. My engine has less than 50k on it and has been oil changed at least once every year and it's been taken apart and put together again a few times over the last 4 years.
Matt blue se2 said: how many miles matt? Just done 24k. Been serviced every 6k miles (once every 12 months)