People used to put in a tank of premium to get 'the good stuff' to help their engines stay clean. But now they put detergents in all grades so it doesn't really get you anything.

吃了93的草改吃91的草要再吃一阵，过一阵看看把91的草和89的草混在一起怎么样。

俺领导看俺那费劲的样子说你干脆少买件搁着不穿的衣服不就省出来了吗。