i currently have 15x8 black steel wheels on 33x12.50 m/t's but im considering buying some 15x10 eagle alloys b/c they are fairly inexpensive, look great, lighter, and wider for a better tire contact patch. since im going wider im trying to gain as little unsprung weight and rotational mass as possible so i think alloys are the way to go. will the 15x10 alloys actually be lighter than the 15x8 stellies and if they are do you think i will i notice the weight that is taken off or get better gas mileage?

These are what i want.
Eagle Alloy Rim Specs

These are my current wheels( the chart doesnt list the weights)
American Racing Black Steel Wheels

87 22R PU, 2? body lift, 33? BFG muds, 4.88's, F&R Lock-Rights, Rancho Shocks, EB's Street RV Head w/ 268 Cam, LCE Header, 2" to 2 1/4" exhaust, Flowmaster 50 series, Magnaflow high flow cat, complete Herculined SR5 interior, V6 BB, MC, and calipers.