ditto. ive been using product for gas and diesel for 8 yrs now and know what it can do as i kept track of before and after. sure it's not certified by me...oh wait, it is certified by me. it's official. customer approved for vehicles from 1929 thru 2009, both gas and smokey old diesel, now clean as a whistle, with greatly improved mpg. product has always been great and several different test results have proved it. mine might just be the longest testing that has been going on for many a year now. model A's lead the way with more than 25% increase in mpg. sure, there arent a lot of them on the road, but, they do use internal combustion engines, and to my knowledge they are still in modern iron.
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