Your Toyota 4Runner started to shake after a routine oil change?

That's never good but it depends on the shake. Since I don't trust shops I immediately think they did something. Like took of a connector from a spark plug, removed the weights from the wheels so it is now out of balance or did something else. SO if you can check these first do so. After that call the shop back and see if they did something like rotate the tires and not tell you. Always check the oil level yourself after they do it too.

'I have had too many examples of them not filling the oil all the way full after they are done. Other than that you should not have any difference from oil change to oil change.