After a tank of gas i can see and feel a differance. The ho has a bit of its spunk back (3400) and im getting better gas milage. Last tank of gas on 100% stop and go traffic i got 160 miles i just had to fill up my tank at 200 miles. we have dirty gas here so i decided that the 10 bucks that i would spend would be worth it either way. seems like it cleaned out the injectors well. I will be using it every other tank full.
I put on over 230,000 km on my sunbird (306,000 total) and over 9 years, I religously put in STP in the 4 cyl every few months. keep it working until the body went in it too many times-yeah..that's it!
You realize those pour in treatments dont do sh!t to carbon build up and the like right? Its the difference between removing paint with a garden hose (tratment) and sandpaper (a professional pressure/sonic cleaning).
I think that takeing them out and putting them in an ultrasonic bath would be the best idea, but for a one time use and 10 bucks i can honestly say that it was money well spent.
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