一定要压力表, 用量无法推测。我有一回加多了，压缩机差点坏了。

Add one can first. Then wait for several days before checking the pressure. If you check immediately after adding, it might not give the correct reading. At least that was with my case.

所有跟帖： 

• 3Q！马上去买了～想省事看来是不成滴：p -仨饱一倒- ♂ (0 bytes) () 06/25/2009 postreply 10:44:41

• 压力表可以买跟 134a 罐一起来的那种。我买的时候好象共$30， -色大胆小- ♂ (30 bytes) () 06/25/2009 postreply 10:45:22

• 要油干嘛？我这小车，一罐134a应该够了吧 -仨饱一倒- ♂ (0 bytes) () 06/25/2009 postreply 10:47:31

• Should be enough -色大胆小- ♂ (0 bytes) () 06/25/2009 postreply 10:52:46

• 油还要单买啊,我还以为是加在制冷剂里了已经 -z.a- ♂ (0 bytes) () 06/25/2009 postreply 10:47:52

• 混在一起了我是说 -Z.A- ♂ (0 bytes) () 06/25/2009 postreply 10:48:24

• Mine was a different story. It was a R-12 system. -色大胆小- ♂ (0 bytes) () 06/25/2009 postreply 10:53:25

• 这么费劲，不如让修车的给换了，自己回头给人家 -mi⊙id- ♂ (16 bytes) () 06/25/2009 postreply 10:49:30

• I already cut my own grass.... -色大胆小- ♂ (0 bytes) () 06/25/2009 postreply 10:53:59

• I mean cut for others to balance your payment for the car -mi⊙id- ♂ (0 bytes) () 06/25/2009 postreply 10:56:16

• Compare with cutting other's grass, I would rather add my R134A -色大胆小- ♂ (95 bytes) () 06/25/2009 postreply 10:59:00

• 是手艺活 -Glider- ♂ (0 bytes) () 06/25/2009 postreply 11:02:32