Parking Lot Shenanigans - Part 2

[Xmetal]

Had another session after finishing up at work and i'm slowly getting the knack of controlling DOF on large objects, I'd still like to know how to get the whole car in focus but have a nice blurred background. :???:

For better DOF should I:

Stand further back?

Move the car further away from the beackground?

Use a longer lens?

Thanks in advance.