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You will need a special filler tube. The filler tube comes with the container of mineral oil purchased from a Jaguar dealership. I got lucky and was able to acquire the special part from my local mechanic instead of a dealer.

Near the right front nose of the car (with the hood open), you will find the mineral oil reservoir. On the top of the reservoir, you will find a dust cap. Thoroughly clean this area - making certain that nothing foreign (i.e. dirt) would be able to fall into the reservoir and contaminate the system.

Remove the dust cap then insert the special filler tube into the top of the reservoir. You will need to give the filler tube nozzle about a quarter turn - locking it into place. You may then pour-in the mineral oil. There should be a clear "indicator window" on the reservoir. You know you have added enough mineral oil to the vehicle when the indicator turns green.

Disconnect the filler tube nozzle and re-install the dust cap.

When you are done, do not throw the container (or more specifically the filler tube nozzle) away. The next time you need mineral oil, you can purchase mineral oil from somewhere other than Jaguar (I use Castrol Mineral Oil). By reusing the Jaguar brand container / nozzle, you can save yourself a trip to the Jag dealership and, thus, some money!

I suggest that you keep-up with this maintenance and if you get a low brake pressure indicator, get yourself some mineral oil immediately. I kept putting this off on my XJ6 and found myself a hundred miles from home with only about 10% braking capability (and without my special filler tube)!

I hope that helps!

- Keith Fieler

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15y ago

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