09 V with 90k on the odo as of today. 2.5 upper/new era 4in full CAI, full kooks front to back with elec cutouts, misc other non important to this topic. 562 w/605tq. My question is back in the summer upon decel she would blue smoke a little and under WOT would blackish smoke a little. I got it retuned and its running perfectly. How long do there motors go without needing a refresh as when that happens Im going to cam it and e85/injectors.? Should I get a leak down test now to check for health?