What Are You Doing To/With Your Car Today?

cleaned the EGR passage on the 'ol SC400, getting it ready for smog test. It passed within just a few points last year.......dont want to have to buy cats or O2 sensors for it as I barely drive it. Any sneaky tips to pass smog? White gas, Lots of HEAT, lots of heat (ie, driving it for 20 minutes before you test, and let it idle while waiting...that seems to be the best tip), oil change?