Originally Posted by joycesjag

Your oil cap under the hood should even state "Castrol 5W 30"

Originally Posted by Jimmy 68

Yes it is recommended, I use Castrol 5W30 too.

I've been thinking of going full synthetic, and going to the 10,000 mile change interval.

I was going to do 5,000 mile intervals with regular Castrol 5W30, but since reading the addendum to the owner's manual thats states it is okay to go synthetic, I'll use that and go to the 10k mile change intervals.

Originally Posted by Mikey

The Castrol people would just love to have your money, so they'd prefer that you use their oil.

The Jaguar/ Castrol relationship is purely a marketing deal, nothing in any way related to product superiority. There's tons of posts hare agonizing and arguing over oil brand, type and viscosity but precious little in the way of evidence that any product is superior to another.

Use an oil of the recommended viscosity and API category as specified in the owner's manual. Anything beyond that will be just to make you happy. The car couldn't care less.

Standard oil change interval is 10K miles/16K KM or one year. As noted many times, North American owners are still hung up on extended change intervals even though they've been around for decades.

The standard on the newest cars is 15K miles, so our 10K looks a little old school and conservative.

Originally Posted by joycesjag

Below is a picture of a US market Jaguar 3.0 engine taken less than 3 minutes ago. God bless Castrol and Jaguar calibrating! Our US parts stores run bimonthly sales on Castrol conventional oil, and yes I take full advantage of the sales! I just go somewhere else to purchase my (unnamed) 710 filter !


Oh and for those that have witnessed Joyces under bonnet, sorry I haven't hosed it down for a month or two, so I apologize for the dust and 710 ring around the filler after this past weekend.