Do Taxi Missions in Any Car

Get a taxi. Find a car, prefferably a fast one. Hold R3 and get out of the taxi. Still holding R3, head over to the car you want to use for your taxi missions. Get in the car and release R3. Your taxi missions should now start and you can do them in the car you are in.

If you get the message Taxi Mission Ended or Cancelled, get back in the taxi and repeat.

Eh never heard of that one

I will need to check this one out for that

It works. I just did 35 passengers in a row in a Cheetah.

That's brilliant. Must try, thanks!