I sure some of you use these kinds of treatments/additive.... Bardahl laa, X1R laa, Z-Max laa, Nasa laa.... they all claim that it can do wonders for your car's engine.....
HOWEVER....
Some people say that it voids car manufacturer warranty, its make seals go hard and causes them to deposit in your engine causing more harm, they say it dramatically change the viscosity index causing the more haywire to the engine, some even say that its the biggest scam in the world as it will not benefit...
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