ive driven the car roughly 3000 miles since its been running....in that time i had to put 3 full quarts of oil into it     there are no visible leaks......what is happening to my oil?

hey guys iam looking to ad a oil press gauge any one know off the top of there heads what size is the oil press sensor isl press sensor

i dont know there was one of these.... http://starion.mrbdesign.com.au/turbos.htmlhttp://starion.mrbdesign.com.au/images/RalliartTurboB.jpg

75 shipped. same as http://www.ebay.com/itm/Trust-Greddy-Original-Japan-TVVC-Manual-Turbo-Boost-Controller-/121073124907?pt=Motors_Car_Truck_Parts_Accessories&hash=item1c3085462b&vxp=mtr   come with black or red 3 mm vacum lines