[ainarssems]

Originally Posted by Audifan

I re-watched the video and he said diesel oil not diesel fuel. He also used seafoam and here is a link to it.

Don't know about USA but here these days pretty much all engine oils are made for use in both petrol and diesel engines. In the old days when diesel fuel contained much more sulphur there was more sulphur neutralising additives in diesel oil. These days there is virtually zero sulphur in diesel and all oils are much better so there is no need for specific diesel oils.