Oil choice for specific manufacturers
Discussion
I've bought another car (2007 Jag XJR) and was overjoyed to see it takes 5W-30 as I've got gallons of decent synthetic from a recent previous vehicle gathering dust on the shelf.
However when I get a look the dusty/shelfy stuff its says its for Porsche/VW on the side, and a website says there is a different formulation of this same oil for the Jag (Ford).
Is it really important with frequent (3-5000) changes that I prefer? There is obviously generic 5W-30 available anywhere with no specific vehicle in mind which could just as easily end up being used by an owner.
My inner skinflint says toss it in and change frequently but am I really risking anything by doing so?
However when I get a look the dusty/shelfy stuff its says its for Porsche/VW on the side, and a website says there is a different formulation of this same oil for the Jag (Ford).
Is it really important with frequent (3-5000) changes that I prefer? There is obviously generic 5W-30 available anywhere with no specific vehicle in mind which could just as easily end up being used by an owner.
My inner skinflint says toss it in and change frequently but am I really risking anything by doing so?
Edited by Loose_Cannon on Thursday 30th November 11:04
Edited by Loose_Cannon on Thursday 30th November 11:07
I think your question is whether two variations of similar oil from the same manufacturer are compatible and intermixable.
I don't see how it's possible to answer that without knowing the specific oils involved. Even with that information, you'd probably need a specialist such as opieoilman to know the answer.
For what it's worth, from my layman's perspective I'd be surprised if two similar oils from the same brand were incompatible without that being warned fairly prominently in the bottle and/or data sheets.
I don't see how it's possible to answer that without knowing the specific oils involved. Even with that information, you'd probably need a specialist such as opieoilman to know the answer.
For what it's worth, from my layman's perspective I'd be surprised if two similar oils from the same brand were incompatible without that being warned fairly prominently in the bottle and/or data sheets.
Think yourself lucky you've got the XJR, I've got the XKR with the 5.0 engine which takes Castrol 0-20w, which doesn't seem to exist anymore and the specs are all inter-related with Ford engine specifications which 'might' be superseded by other specs, but no one seems to be able or want to confirm. So finding oil which is definitely applicable is impossible. Castrol's own website merely states to contact dealer. It's the same story for my RR which has the same 5.0 engine in it.
I spent literally hours and hours trying to find the correct spec when I did an oil change on the XKR a few months back, and I'm still not sure I got the exact correct oil.
I spent literally hours and hours trying to find the correct spec when I did an oil change on the XKR a few months back, and I'm still not sure I got the exact correct oil.
I'm not an expert but I'd go ahead and use up the stuff you've got.
As long as it's decent quality, you're doing regular changes and you let the engine warm up before putting sustained, heavy loads on it you'll (probably) not cause any significant engine wear.
I've read before that most wear is caused by pushing too hard when the engine and oil are cold. In a decent modern car I'd expect everything around the engine to die long before an engine needs to be rebuilt.
As long as it's decent quality, you're doing regular changes and you let the engine warm up before putting sustained, heavy loads on it you'll (probably) not cause any significant engine wear.
I've read before that most wear is caused by pushing too hard when the engine and oil are cold. In a decent modern car I'd expect everything around the engine to die long before an engine needs to be rebuilt.
Piersman2 said:
Think yourself lucky you've got the XJR, I've got the XKR with the 5.0 engine which takes Castrol 0-20w, which doesn't seem to exist anymore and the specs are all inter-related with Ford engine specifications which 'might' be superseded by other specs, but no one seems to be able or want to confirm. So finding oil which is definitely applicable is impossible. Castrol's own website merely states to contact dealer. It's the same story for my RR which has the same 5.0 engine in it.
I spent literally hours and hours trying to find the correct spec when I did an oil change on the XKR a few months back, and I'm still not sure I got the exact correct oil.
Are you sure about 0w20 ? My 2012 XFR (Same engine) takes 5w20 I use the Ford specific Motul one I spent literally hours and hours trying to find the correct spec when I did an oil change on the XKR a few months back, and I'm still not sure I got the exact correct oil.
https://www.opieoils.co.uk/p-79316-motul-specific-...
They do a specific service pack for the Jag/RR AJ3
https://www.opieoils.co.uk/pv-139745-motul-specifi...
liner33 said:
Piersman2 said:
Think yourself lucky you've got the XJR, I've got the XKR with the 5.0 engine which takes Castrol 0-20w, which doesn't seem to exist anymore and the specs are all inter-related with Ford engine specifications which 'might' be superseded by other specs, but no one seems to be able or want to confirm. So finding oil which is definitely applicable is impossible. Castrol's own website merely states to contact dealer. It's the same story for my RR which has the same 5.0 engine in it.
I spent literally hours and hours trying to find the correct spec when I did an oil change on the XKR a few months back, and I'm still not sure I got the exact correct oil.
Are you sure about 0w20 ? My 2012 XFR (Same engine) takes 5w20 I use the Ford specific Motul one I spent literally hours and hours trying to find the correct spec when I did an oil change on the XKR a few months back, and I'm still not sure I got the exact correct oil.
https://www.opieoils.co.uk/p-79316-motul-specific-...
They do a specific service pack for the Jag/RR AJ3
https://www.opieoils.co.uk/pv-139745-motul-specifi...
My handbook says 5-20W Castrol of a particular grade (specific to the ford engines).
But plenty of on line sources have scans of advice to jaguar dealers / tech bulletins saying the use 0-20W from about 2012 onward.
Then there seems to be some versions of oil specifically coloured to make it JLR approved, other versions where some websites say it's ok, but it's not the original spec., and the superseded values are all over the place and countermand each other.
I have literally spent hours online trying to make sure I was getting the correct oil... and ended up buying some that I thought would be badged JLR approved, but when delivered wasn't.
I gave up at that point and just bunged it in.
I have heard that the 5.0 Range Rovers from 2015 recommend 0w20 but afaik its always been 5w20 for the Jag
The Motul stuff certainly meets all the requirements
A main dealer actually put the 5w30 in my car last service and despite the invoice saying so they denied it so I just changed it myself to be sure , its a 20 min job with an extractor
The Motul stuff certainly meets all the requirements
A main dealer actually put the 5w30 in my car last service and despite the invoice saying so they denied it so I just changed it myself to be sure , its a 20 min job with an extractor
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