My first tank was 27mpg, second tank since the idle learn was 28mpg, so my MPG did improve
I think I still have a lurking issue with the MAP sensor because most days I don't get the shudder, but on really cold mornings sometimes it does happen.

Should I just clean the MAP sensor with rubbing alcohol?

 

Go to your auto parts store.... they have cleaners that are made to specifically cleaning senors.