This is arguably slightly more advanced use of a scope but I enjoyed this from scannerdanner. Looking for jumped time by graphing starter amp draw against when cylinders are firing.
Pico7 has so many guided tests now:
PicoScope Automotive Guided Tests - Information & Troubleshooting
Guidance, setup, configuration and fault-finding plus technical information on more than 150 systems and components. Right first-time with PicoScope.
www.picoauto.com
With that said, setting up the software is probably 60% of the battle, interpreting the results is 30% of the battle. A scope has some other uses as well - I am especially intrigued by the NVH capabilities that are now being utilized by some OEM's.