My local Jag dealer has been using Pennzoil for my last 2 annual oil changes instead of Castrol.
Just saw a great rebate deal from Pennzoil.
It's a pain to go thru, but quite worth it since it's on sale at both Amazon.com & Walmart.com for $20.98 + tax, free shipping
receive Pennzoil rebate $22 Shell gift card thru online rebate, it accepts both at Amazon & Walmart
I bought one 5 qt bottle to ship to office in my name, another 5 qt bottle in my wife's name to ship to home
Applied 1 online rebate, & go to another browser to apply to 2nd bottle since it'll only accepts one rebate at a time
This is 5w30 for my wife's car...

https://www.pennzoil.com/en_us/promo...L2luZGV4LmNmbQ

https://www.walmart.com/ip/Pennzoil-Ultra-Platinum-5W-30-Full-Synthetic-Motor-Oil-5-Quart/55291206?wmlspartner=wlpa&selectedSellerId=0&adid= 22222222227068358716&wl0=&wl1=g&wl2=c&wl3=17367160 7425&wl4=aud-430887228898la-278074995326&wl5=9027656&wl6=&wl7=&wl8=&wl9=pla&wl 10=8175035&wl11=online&wl12=55291206&veh=sem&gclid =Cj0KCQiApt_xBRDxARIsAAMUMu9vGwtA30--swS1rxoSYJeonPsiFyWBjrUFi0Djw94vpm9E5bYOktcaAshjEA Lw_wcB

 

as long as the oil meets jlr specs all will be fine check hand book for this . shell is also good

 

Already discussed at length over on the XK forum, mainly about the 5W-20 which was the old spec for the 5.0 V8, see here: https://www.jaguarforums.com/forum/x...6-5qts-228063/

 

Don't wanna in depth discussion about oil, just letting people know about good discount sale.
If u don't need, pls move on...
Sorry, I don't own an XK, so I don't troll that forum.

 

Are you referring to the

2020 Pennzoil 22 Days to the Pennzoil 400 National Promotion

Which applies through February 23, 2020, and is a $25 USD gift card at Shell (limit 1),

or the $10 rebate (up to 4 per household/address) on each 5 qt purchase (available all year thru the end of 2020)? Either way its a Good Deal.

++++++++++++

EDIT: Also, while I'm seeing the 5W-30 at the price mentioned ($20.98/5 qts) the 5W-20 is $24.97/5qts.

 

Maybe you should, you might learn something...