What is the highest viscosity bunkers you've used in a slow speed diesel?

Engineering
1

I remember we loaded some 480 cs fuel on one of 'the APL C-11’s I worked on in 2008.

2

Which C11 were you on? My father retired Chief off the Philippines. Last time I was on a C10 I believe we loaded IFO 500

3

Just on 700 cST on a G-class