here

（1） there are two ways to know if there is a percentage of bio fuel in the pump - a) look at the sticker on the pump; some will say. for example, costco gas pump has the label. b) go inside ask the cashier.

(2) the gas #s are only telling you how much octane is in it (you would also see "(r + m)/2 method" next to it). the octane numbers, also called antiknock ratings, tell you how resistant the gas is to knocking.

(3) the gas # does not tell you the quality of the gas, nor has it a direct relationship with gas mileage

(4) what gas # to use should be based on what your engine was designed for.

所有跟帖： 

• 哦，我以为贵油纯，燃烧充分，所以跑路长，杂质留下少 -慧惠- ♀ (71 bytes) () 01/06/2015 postreply 14:53:43

• 不谢。 你用87号就对了 -老生长谈- ♂ (0 bytes) () 01/06/2015 postreply 15:16:02