Hello to all my Jag lovers,

I want to change oil brand from Castrol synthethic to the following 3:

1. Amsoil
2.Motul x cess
3. Liqui moly.

I want to know your opinions on them and if you have used any of them.\\

Thanx!

 

Those are three great choices if you like spending money for nothing. There's no evidence anywhere that 'boutique' oils work any better than the normal mainstream brands.

Your car does not require synthetic oil by the way.

 

I have used this last two years:


LIQUI MOLY - Motor Oils, Additives, Car Care - Products - Synthoil Race Tech GT1 10W-60

 

10W60 oil (any brand) is outside of the viscosity range recommended by Jaguar.

The owner's manual allows:

0W–30
5W–30 (preferred)
0W–40
5W–40

 

"recommended by Jaguar." I don't care what you say, because your main point in this forum is come into every threat regarding oil, coolant, air filter to read Jaguar manual ss a some kind of bible. 10W-60 is great oil for summer use in high tune supercharged engine when you push hard - track, drag race, 200miles autobahn driving at 130mph+ and it also works great in normal use. Liqui Moly 10-60 oil, Evans waterless coolant and RVS Technology engine products are all great stuff.

 

That's wonderful. How does it do (long term) in climates like the OP's where it gets to -30C in the winter?

How is it better than the recommended viscositys for summer driving?

 

-30C is basic thing here. -52C official record and -57C somewhere outside weather stations. I do not recommend 10-60W as cold start in -30C. It worked well in my 520hp+ old, small Jag engine. Most probably I will put it into my bigger, much more powerful new engine. Cheers.

 

If you ask me, I would highly recommend Pennzoil's Ultra Platinum. Shell's method of synthetically cracking stock from natural gas makes some of the best synthetic base stock on the market today.

 

Since the thread is about suggestions I'd say: whatever Jaguar say for where you are. I doubt that includes 10W60!!

Of course it can be that Jaguar despite who they are cannot figure out the right oils for their engines... (that's not my thinking)

 

Lubricating oil technology does change over time. Keep a car long enough and the manufacturer recommended grades won't even exist.
My Alvis recommended two different monogrades for summer and winter because VI improvers hadn't been invented
They recommended oil changes every 3000 miles (or 1500 under harsh conditions!) because detergents and dispersants hadn't been invented.
They required the sump to be dropped and the internal mesh oil filter removed and cleaned in paraffin because disposable oil filters hadn't been invented.

Might it be more useful to post what grade of oil is now recommended by JLR for the latest iteration of this engine?

 

Just put the oil recommended for your engine and more importantly change it a little more often did this for my customers for forty years never had a engine go bang through oil problem

 

" MULTI VALVE ENGINE " and " 60 GRADE OIL " don't go together .
5W-30 grade will cover most engine and climate conditions .

 

There has been no change, but any such update does not necessarily mean that it would apply to earlier engines.

 

I use 5W30 Castrol Edge. I have used Mobil 1 0W40 as well. Both are easily had for cheap and it's hard for me to justify boutique oils when technically conventional 5W30 would be just fine for my 6k-8k miles per one year service intervals.

 

Louenigma,

I also use Castrol Edge 5W-30 in our '04 XJR, per Jaguar's recommendations. Our Walmart often prices 5 quart jugs at around USD $23.00.

Obviously, the temps you have to deal with in a Canadian winter would suggest you should consider 0W-30 or 0W-40 weight oil, and any good quality oil from any of the major brands will be fine. I personally would steer clear of off-brand convenience store oil as there have been reports of some of those failing to conform to the grades printed on their labels.

Mikey is correct that Jaguar did not begin specifying synthetic oil until after our cars were made, but since one of the purported advantages of synthetic oils is better flowability in cold temperatures compared to conventional oils, that may be something you want to research before making your final decision (that is, if you can find data from a source you trust to have no stake in the debate).

Cheers,

Don

 

I use a 10W50 pao synthetic in my XJ8

Its very hot over does not get under 10 Celsius in winter at 3 am in the morning

I have been over at my mechanics last couple weeks doing some stuff to my other cars and noticed how many late model cars he has had this year with stuffed motors and low k,s all brands as well seems they all have run out of oil at some time or the oil has sludged up the engine

We have both come to the conclusion that the thin oils are not suited to this climate unless you check them weekly and change them early something a lot of people do not seem to do

For all my round town cars I use diesel oil bought a fair amount of 15W40 Amsoil enough to last me a decade I think! at a fantastic price so that looks like its going to go in the XJ8 and everything else as well

Whatever the dealer used in the car originally rattled for a second on start up does not now but
I also don’t drive the XJ round town only 100 plus K journeys minimum and plenty highway use
I think you need to do your homework about climate usage change intervals and so forth to get a idea of what oil to use

 

And that's the problem- trying to find reliable, objective long term data. There's very little despite the availability of synthetic oils for over 40 years. The credible info I've been able to secure comes to the conclusion that there's little or no benefit aside from extended change intervals. No easier starting, no reduced wear, no increased mileage, no longer engine life, etc etc.

Given that many owners change oil at more frequent interval than recommended by Jag for conventional oils, the sole advantage of synthetics disappears with it.

 

Aston Martin Vantage 4.3/4.7 AJ-engine is not far from our engines.
Also 10W-60 is recommended for BMW M3 and M5 etc.

 

Might as well throw this into the mix and angry up the blood

 

Castrol doesn't design, manufacture or warranty the engines when it all goes wrong, Jaguar does.

OEM's spec always trumps the supplier's.