Bunkering instructions Mixing of fuels should be avoided due to possible incompatibility problems. Bunker tank utilization must be managed in such a way that mixing of fuels from different sources is reduced to a minimum. It is also important to consider the possible problems with slack tanks. Mixing stable fuel oils with equal performance may result in unstable fuel oil with a total dififerent performance.Bunkering instructions Mixing of fuels should be avoided due to possible incompatibility problems. Bunker tank utilization must be managed in such a way that mixing of fuels from different sources is reduced to a minimum. It is also important to consider the possible problems with slack tanks. Mixing stable fuel oils with equal performance may result in unstable fuel oil with a total different performance