I like 15w-40 Rotella or Dello or Motorcraft oil check owners manual for more oil weights for weather conditions.
The recommended oil for a 1986 Ford F250 diesel is 10 W 30. However, both 0W-30 and 5W-30 can be used.
5w-30 or 5w-40 is what is recommended by VW for use in your Beetle. If it's the 1.9L Diesel, use 5w-40 Diesel oil. Regular oil doesn't have the added detergents etc that this diesel brand does.
Petrol or diesel? What year? All today's Ford engines, both petrol and diesel, use 5w/30 'fuel saving' oil.
I was looking at motorcraft.com and found listings for the 7.3 L diesel from 1988 to 2003
5W-20 , according to the 2003 Ford Mustang Owner Guide
All today's Ford engines, both petrol and diesel, use 5w/30. This type of oil is readily available on supermarket shelves and the containers marked "Suitable for Ford petrol and diesel engines".
Diesels do not use oxygen sensors
Diesel fuel is often referred to as "diesel oil" or "heavy oil". Do not confuse this with "engine oil for a diesel engine" which means "lubricating oil specially formulated for use in diesel engines". My first Ford Fiesta diesel's tax disc said - "Fuel - Heavy Oil". They've now realised that this term is anachronistic, and my latest tax disc reads "Fuel - Diesel". To be pedantic - Diesel fuel is an oil - Petrol is a spirit.
NO, do not use diesel oil and a gasoline engine.
Ford uses the Motorcraft blended oil (part synthetic).
No, use only the correct filter.
Depends on which engine it had... gas and diesel engines were available for that vehicle.