Wagonmeister is happy to share links to respected suppliers and other sites.
Auto RX is not just an oil additive, it's your car's very own doctor in a bottle! Wagonmeister uses and highly recommends Auto-RX for any vehicle.
http://auto-rx.com (Home Page)
KustomSmoke Vacuum Leak Detector
Yes, I know, there are a hundred articles out there on the web that will tell you how to make a smoke generator. I'll bet some of them actually work for more than a minute too. Been there, done that, now I just use Brian's smoke generator. This device works like a charm, puts out more than enough smoke to fill even a turbo engine's plumbing, comes with everything you need right out of the box and is well built and easy to use. You can find videos on YouTube, just search for Kustomsmoke.