I can get off the subway or bus one stop away from my destin

语法上没有大毛病.但是句子前后关系有点问题.
建议改为：if i get off the subway/bus one stop away from my destination,we could save some gas.
或者
I'll get off the subway/bus one stop away from my destination,so we could save some gas.
或者
By getting off the subway/bus one stop away from my destination,we could save some gas.
另外主语前后要一致.
到底用i还是用we要决定好.
一切要看你具体要表达什么意思.