Mark,

Sounds like your baby's getting some good pamperin' ... love to hear that!

You're right, too... everyone does have their opinion on synth fluids. I use RP, but feel that either way you're going to be fine (mobile .vs rp .vs amsoil, etc).

Along with your EGR valve cleaning ~ ask that they also clean the throttle body... mine was full of build up, etc., and couldn't hurt to have yours cleaned.

Best of luck!

-biju.