*start rant* I put it to you all this way, in a cars lifetime what makes it go, run efficiently and for lack of a better word, good. Four things are required: Fuel, Water, Oil and Air . Take air for example its FREE, take Oil (depending on how anal you are about your engine and requirements) it's priced between $15-$75 (5L) ,unless your racing it, take Water although the sheer lack of it in our country its on the increase and getting cheaper, and OYG FUEL YES FUEL PEOPLE!!! Again relatively cheap over the lifetime of a vehicle, considering accidents and engine's needing work on them then you have panel rust etc... Point is those four things have to be the cheapest things you can put into your car to lengthen its lifetime and increase performance. Not to mention it won't break the budget even if you are earning SFA. *end rant*