you dont use oil at all trust me, hook a shock cable up to your car and hook the other end on a stick of bread
Depends on the year Jaguar you're referring to which you did not list. Therefore it is impossible to answer your question.
My dealer uses Valvoline Durablend 5W30 or 10W30 depending on your climate.
i use the one with an engine garrunty
5w-30 is recommended but you can use 0w-30 as well. You can also use synthetic oil if you wish but it is not needed.
The owner's manual recommends Castrol 5W 30.
10W-30
5w30
10W-30
Any oil recommended by your local oil lube specialist. When it comes to oil, you essentially get what you pay for.
You need synthetic oil
Use 5W30 in most cases.
always use synthetic if possible