除了自己换机油最好不要自己修，不安全。即使换机油也不值得。

if not a mechanic, you'd better not do lots of such jobs

i actually have done alot stuff on my car, but am not a mechanic, just that i do have a good mechanic friend on my side if i mess up, hehe

to the author, what would you like to do to your car anyway?

just try not to make things worse~~~

用一个 coupon， 换次机油也就是10 ~ 18$ ， 你自己换省了也就6$ ， 你一年能省几个钱啊

when it is new car, i use mobile 1, and all those engine cares. it is not about the save, but it is about i know what goes in my car.
but for parents, hehe, they want to save even just for a penny, so ..., since i know little car care and my best non asian friend is a car shop owner, it became my job.