Classic Saab 9-5 (1997 - 2009)
A mystery:
I bought this 9-5 2.2TiD about a year ago, at the time it did around 50-55mpg, went lovely, but turbo unusually loud I thought.
A few months on I renewed the air filter, and at the time I noticed the rubber hose connector into the turbo was split almost all the way round and...