I've got no problem with the Sunday dinner thing as long as you keep the mindset of NOT pursuing her. It's OK to show off what she's missing, but when the sole purpose of the dinner is to show off then that's pursuing.
As for the the car. Yeah, no problem there as long as the motivation is goodwill and not to win her back.
Remember: The changes you are doing are for YOU. To better yourself. They have nothing to do with her.
M:11 | T:12 | Status: Married 4C's of WAS communication: Cool, Calm, Collected and CONFIDENT