I have used it for the second tank and noticed an improved economy, before I use it, it traveled about 550km for the main tank. This second tank with Activ 2T, it traveled 612km so far and the low fuel warning has not turn on yet. The engine seems running smoother but that can be contributed to the dawes valve that I put in recently. I will continue to use it further. It is not a cheap additive as it will cost about $6 per fill so I will look around for better price.
On the other word, Activ 2T is waht everyone uses, I read somewhere that do not use marine one as well as they have amonia for salt water corrosion inhabitant or some sort, so it not suitable although they are some how cheaper. I will stick with activ 2T and just get the cheapest I can get.
Also I would not use it on any common rail diesel as the pump produces over 15000psi and has very fine tolerance, they are also designed to be fed with low sulfur diesel so the 2T oil would not benefit as much.
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