Our mechanic (well respected independent) recommended going to Motul 5W/30 motor oil - they said that this was approved by JLR to help older engines with wear. Has anybody else been so guided, or have thoughts on this guidance? If there is something I could see published from JLR, I would feel better. Trying to not lose faith in this local service provider, but concerned - would appreciate insights...

 

Perhaps they meant Motul specifically designed to meet JLR specifications?

 

I don't think so. When at home with the shop receipt, I saw Motul 5W30 on the paperwork. I called to inquire about this being different than the 5W20 called for on the cap (and in the owner's manual). It was at that point that the advisor responded that this was approved by JLR to help older engines with wear.

 

😱 Oh, no. Here we go again!

5.0L Engine Oil Recommendations.

 

I don't know about the 5.0 but my 4.2 manual states:

For climates ranging from -35°C to +50°C (-31°F to +122°F), the following oil viscosities may be used:
0W-30 protects from -35°C to +35°C (-31°F to +95°F).
5W-30 protects from -30°C to +35°C (-22°F to +95°F).
0W-40 protects from -35°C to +50°C (-31°F to +122°F).
5W-40 protects from -30°C to +50°C (-22°F to +122°F).

As far as the UK is concerned, any of those oil would be absolutely fine. In essence, you can use whatever you like. 😉

Richard

 

From what I understand JLR switched the recommended oil to 0w-20 to help get oil to the chain tensioners faster . I have been using Liqui Moly 0w-20 Jaguar spec with no issues .

 

Depends on climate, in colder regions, 0W20 would be best, in warmer climes, 5W20 is advised. All of the main dealers in my area ONLY use 5W20 oil, never 0W20.

 

In Ohio, I would only use 0W20 for all-season convenience. Must be a misunderstanding somewhere, 5W30 would never be advised for the 3.0 and 5.0 litre motors.

 

5w20 and 0w20 is for fuel economy reasons not chain tensioners

any manufacturer on the globe will tell you this..they spend millions of dollars for tenth of a percentage point gains

 

I read about the 0w-20 better for chain tensioners somewhere on this forum awhile back

 

Has nothing to do with tensioners. Maintenance is what matters for tensioners
and everything else in the engine.

 

The VVT units become very cross if the wrong oil viscosity is used.

 

yes low pressure CTA phasers really care about oil viscosity....meanwhile at ford every engine family is getting 5w30

 

Yes - we got to the bottom of the issue. The service advisor mistakenly put the Motul 5W30 oil on the invoice. The window sticker and the mechanics recollection was that the correct oil was used (5W20). Not so happy about the earlier explanation about this being better for my engine... My lesson is to be far more prescriptive and scrutinize the paperwork at checkout.

 

increasingly confused by the recommended oil issue; I thought Jaguar had changed the advice to 0-20 for the 5L engine, or is my senility showing through ?

 

No need for confusion, Jaguar is clear. Right from Topix
”SAE 0W-20 engine oil meeting Jaguar Land Rover specification STJLR.51.5122.” for the 5.0l.

The only confusion by some is the misunderstanding of the viscosity and how it relates differently between conventional and synthetic oil.

 

thank you !

 

Greetings GUY!!.. I'm going to purchase Liqui Moly 0W-20 for my 2011 XK 5.0L, As we are approaching winter in Wisconsin.. I won't be driving in storms but I will take it out on a sunny winter day when roads are decent. I have Michelin Pilot Sports All Season and this will be the first winter with them..

 

@Matusco , Sounds like a good plan to me.
My car did not have the inline heater (block heater) from new, I had it installed afterwards.
With your oil and tires, you’re set up pretty well for the cold days coming.
The only thing I could add is get the front and rear subframes protected from rust.

 

When choosing a synthetic oil to run in the winter months, the viscosity is relatively unimportant, because the oil doesn't thicken much in "very cold" weather. What worries me more are the manufacturers choosing a thinner viscosity, to achieve a better MPG. So I tend to run thicker oil, and the hell with MPG.