No sign of mileage to the car, It just starts the cooling process early then normal. It would not change the mileage.

The plus thing to this on the cars is the hood will not steam any more when water rest on the hood. So that means no paint damage to the car or metal fatigue with water and heat under the car.

-------That is a major plus for the car and that was a big sign i knew it was working better..before my hood would be extreamly hot on the touch..but would not burn you...now it is warm..I am happy with a cooler car...

------- There is no effects on the heating and a/c systems that i have noticed...it actuallys seems to warm up faster on the heating end...so that tells me that the car is doing the natural cool down by put more heat in the heatercore....

*remember to depressuize the system before u do this mod...Our u will be drinking anti-green just like i did.....hahahaha

any questions on any mods pls feel free to ask or email me at ruby@cliffhanger.com or even call me 701-837-0679...