I ma not trying to be critical, but I would NEVER let gasoline touch my finely polished XF (or WD-40). 3M makes a VERY good wax and adhesive remover specifically for the job, been using it for 15+ years to debadge, amongst other things.

It does not have the immediate effect gasoline probably does, but it is safe for automotive finishes and only takes a few minutes to penetrate the adhesive....