The point I made is that Zmax and others have no use in todays automotive world. Why? Because not one auto maker or oil company says to add Zmax to their products. Again not one person can find anything in writing that states add these products. There is a valid reason why, they do not work and sometimes cause engine damage. Thats the truth and the proof. I still say if you have a 100 dollar car that smokes and the engine is toast, go ahead pour in the Zmax, however if you just paid 30,000.00 for a new car or truck, stay away from these additives.
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