I would imagine that oil would do you just fine... Mobil 1 is damn good stuff... I have the Mobil 1 synthetic in the silver bottle, I dont recall the cap color or label color, but I know it was the best stuff I could get where I went, I had it changed at a lube place... it was the only place in town with Mobile 1!
I honestly dont remember if I have 5w30 or 10w30 in my car... I hear either are fine on a supra, depending on how you drive it and how often you are going to change the oil.. but then I could be misinformed... But Mobile 1 Synthetic IS awesome oil.