The differences in opinion here may be because we're comparing #6 in a cold ambient environment to #5/#6 in a warm ambient environment. Still, #6 is no grease.

The differences in opinion here may be because we're comparing #6 in a cold ambient environment to #5/#6 in a warm ambient environment. Still, #6 is no grease. https://en.wikipedia.org/wiki/Fuel_oil#Maritime_fuel_classification https://en.wikipedia.org/wiki/Fuel_oil#Maritime_fuel_classif...