I did it to my car but didn't notice any difference. Pull the vac line off the brake booster, wasn't that hard to do. I bought two cans, 1/2 in the gas tank and 1/2 in the oil. Then with the second can I dumped that into the intake with the booster hose. You have to turn off your car for 5 mins then turn it back on. My car smoked for the next two-three days.
2009 Ford Escape Limited - 3.0L, 6 speed auto, 4x4, 25/33 city/hwy imp mpg.
2017 F150 XLT-XTR - 5.0L, 4x4, 3.55's, E-locker, xtr chrome package, fx4 off-road package.
20/25 imp mpg