G'day I have just purchased my first Saab, it's in immaculate condition, runs great, handles like a dream all electrics work etc though has a damn annoying ticking sound coming from the engine.I have uploaded a video to youtube of it which you can find here -
Ticking gets louder & faster with revs though can barely hear it when I put my foot fully down on the accelerator

It has just had a oil flush & fulled with 5w40 full synthetic, along with having the oil pressure tested sump cleaned according to the guy I got it off which is odd because there's a sticker on the window stating it was serviced in 2015 using 15w50 so not sure why he would go thinner.
Any suggestions on what it may be are very much appreciated! We don't have too many of these cars down here in New Zealand.

Thanks alot!