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About ship oil issues

Today’s cargo ships basically use heavy oil (oil residue), including main engines and generators. Due to its heavy specific gravity (close to the specific gravity of water), it generates more heat when burned, so it is better than when using light diesel oil. Strong motivation. The price is much lower than that of light diesel and it is economical. However, it must be heated to a sufficient temperature before it is easy to burn, which requires a lot of peripheral equipment.

The good oil you are talking about refers to light oil (diesel). The advantages are that the machine has a long maintenance cycle, less combustion residues, and does not require heating when used. The maneuverability is better than using heavy oil. Generally, warships use diesel.