using more oil than I'd like, anyone with some advice?

[fiveohpatrol]

Well for some reason I switched from quaker state senthetic blend 10W30 to conventional valvoline 10W30. before it would use about 3/4 of a quart between oil changes and now i've used about 1.5 quarts in less than 2000 miles, so i know its the oil im using thats making it use a litte more but my question is what brand/senthetic?/blend?/conventional?/weight? oil should i be using with this motor? its got just over 100k on it now, also, i've heard good things about that Restore stuff for piston rings, has anyone here tried it? thanks guys

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88 Notch, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframe connectors, 65mm TB, shift kit, March ram air ,MSD coil, U/L control arms, 155lph fuel pump, cheap 2800 stall, Crane Adj.FPR, best 1/4--> 13.77@101.35