I used it in 2015, but have since moved on. Maybe they changed the blend since then, some colleagues of mine had rust problems. I didn't, however when I dissasembled the engine it didn't look as nicely oiled as it does with the best ones. Back then they were in golden metal cans, now they come in black plastic ones. Nitrolux has performance as good as anything, however longevity not as good as Maxima I am running now. In my opinion- there are far worse fuels, and some better fuels.