Need HELP....Jaguar V6 oil change? synthetic oil?

[fins]

I am in the middle of changing oil in a 2003 Jaguar S type with the 3.0 V6 engine.
I was going to put in synthetic oil..... I looked in the maunaul to try to find the capacity when I saw a note that says that Jaguar does not reccomend using synthetic oil in the V6 engine.
Does anybody know why they reccomend not using synthetic oil?
I would think it would be as good or better thab using conventional oil.

 

[JustinH]

From the Amsoil site... I would try some Delvac1 in this engine.

LUBRICANTS & FLUIDS
Engine Oil
Grade 1......API*
Synthetic 5W-40 European Engine Oil
SAE 10W-40 XL Synthetic Motor Oil
-30 To 50°F......0W-30, 5W-30, 0W-40, 5W-40
Automatic Transmission.....SLF[1]
Standard Differential, Rear .....GL-5[2]
75W-140
Severe Gear 75W-140
SAE 80W-140 Synthetic Gear Lube
Fluids
Power Steering Fluid.....AF3
Synthetic Automatic Transmission Fluid
Torque-Drive™ Synthetic Automatic Transmission Fluid (ATD)
Brake Fluid.....HBH

1. Shell ATF M1375.4
2. Synthetic based oil.

 

[Merkava_4]

To add what JustinH forgot to paste:

CAPACITIES
Engine, with filter..........6.9 quarts[1]
Cooling System, Initial Fill..........10.0 quarts
Automatic Transmission, Total Fill..........10.0 quarts
Differential, Rear..........2.6 pints


7 quarts of your favourite 5W-40 synthetic is what I recommend.

 

[Big Jim]

I don't know why you can't. I use it in my 3.0 Duratec. It is in the same engine family (different heads).