下面是我从PETRO-CANADA网站上 copy 下来的：
PETRO-CANADA TACTROL ENGINE DEPOSIT CLEANER
Remove harmful deposits from your fuel system with TACTROL™, Petro-Canada's unique deposit control additive. Helps clean fuel injectors and intake valves as you drive, which can lead to better fuel economy, better performance and lower emissions.
这东西究竟有没有效果？怎么用啊？多谢了！
PETRO-CANADA TACTROL ENGINE DEPOSIT CLEANER
Remove harmful deposits from your fuel system with TACTROL™, Petro-Canada's unique deposit control additive. Helps clean fuel injectors and intake valves as you drive, which can lead to better fuel economy, better performance and lower emissions.
这东西究竟有没有效果？怎么用啊？多谢了！
