I have the AEM kit, when I was supercharged, I sprayed the blower for 2 years, never had an issue, rotors were still coated, bearings were fine. I'm now turbo and still run the AEM, pretty user friendly, reads boost and sprays by a dial. Nozzle comes with a built in check valve which is great, plus the pump is huge and sprays like a fire hose, I've always ran 100% meth