Use only what the manufacture of that diesel recommends.
10W40
Total 10w40 diesel
10w40 is fine
3liters of synthetic oil 10W40
Petrol or diesel? What year? All today's Ford engines, both petrol and diesel, use 5w/30 'fuel saving' oil.
If you mean motor oil, yes.
No
"Diesel oil" or "Heavy oil" is another term for diesel fuel. Not to be confused with "engine oil for a diesel engine" which means lubricating oil specially formulated for use in diesel rather than petrol engines.
A diesel engine would use 15w40 a gas engine could use 15w40 or 10w40
Yes you can I know a few people that use a 5W-30 Diesel and a 15W-40 Diesel. Hope This Helps.
If you use Petrol or Gasoline in a Diesel engine you will destroy that engine. That is why you do not use it.
Gasoline (petrol) Paraffin Diesel (DERV) Gas oil (Heating oil)