well welcome! hmm. about the sound/speakers. if it were me i would just get new rear speakers and keep the bose. its a nice system. wish i had it. its the only option my car doesnt have. only burning oil part of the time? so i have a few simple ideas. oil has to go somewhere. is it leaking then burning on the exhaust manifold? or if you have too much oil, it has to go some where. so make sure its not overfilled. same if you have too little. there wont be enough and there will be more friction=heat, which will cause it to burn. start your car and take the oil cap off and feel if theres any pressure or smoke coming out of the valve cover. but since your burning oil only sometime, my guess is a bad gasket. does it burn only when you put more of a load on your car? (racing it) or does it happen normal driving too? sorry for such a long post. but the oil problem could be so many things im trying to narrow it down further.