Of course, some ships are already using low sulphur fuel oil to meet the even more stringent limits of 0.10 % m / m when trading in the already - established emission control areas. (imo.org)
[5] Some shipowners will achieve a cut in sulphur content by continuing to use HFO in conjunction with scrubbers; others will likely move towards blends of HFO and lighter (lower sulphur content fuels), while some will move away from HFO entirely. (eia-global.org)
E6 quality is strongly recommended for engines fitted with particulate filters and is designed for use in combination with low sulphur diesel fuel. (mechanics.stackexchange.com)