I'm burning about a quart of oil every week or two, and today I noticed that there is only smoke coming out of the passenger side pipe. Because of that, I have decided to check my head gaskets, and if that is fine, then I am going to assume I have bad rings on that piston. Is there any other possibility? I really have no idea what else could be the problem, so tomorrow I'm going to pull the plugs on that side and check to see if there is some discoloration or excessive corrosion on one compared to the rest. Thanks for any help in advance.