Stopped in NAPA to grab a filter for my 97 XJ6 and my XJR-100. The one on the right is for the 6 (4.0 liter, 7.5 qt capacity) the one on the left for the XJR (4.0 Liter, 7.9 qt capacity). My question is why would they think smaller/less filter surface area would be better? Or is it a case of less room = less filter? The big box store filters call for a smaller one for my V-12 and my XJ6 but NAPA sells the larger one for both, I figured they would have the bigger one for the V8 too.

 

Are they the same thread?

You should see the filter Bosch lists for the V8.

It ends about where the flutes start on the version
you have on the left.

They are trying to cover the 4.0/4.2 with one part
number. The 4.2 does not have room for the longer
filter.

Porsche 911's have the same thread as the V8 filter,
and up to about a foot long.

Won't ever fit the V8 because of the placement next to the
frame rail.

 

To add to this, it depends on how many filter levels they packed into the can also. Do they have a micron per fluid amount listing?

 

What i could find on line says its special "mesh" traps 50% more then most filters. The threads and gasket seem the same on both so I may give the one on the right a whirl on the XJR to see if it'll fit. I couldn't believe how small purolator went with their replacement filter for the 5.3. I use the NAPA 1231 for it and the XJ6 ( and just maybe the XJR)

 

...and of course they don't tell you what those 'most' are. More than likely 50% more than ABC and XYZ standard elcheapo filters from the factory of Hyundai and the like.
Here's a comparison, you can see the NAPA isn't as packed with filtration as say the K&N.



Here's some more from Four Wheeler magazine, I used to 4 wheel and know oil is very important in these conditions.

 

Here's a test result chart (done by Correct Craft boat fans), albeit a boat test, it is a motor and filtration is needed.

 

Well I normally use Fram. Of the cars I have had all have exceeded 300K with my 06 Corolla over 400k. All these with a mix of city/highway and some sitting in traffic. No engine issues, leaking or burning oil at all. I now use on my XJ8 either Wix or Mann.

 

Mine is SC'd, so I get blow-by when I'm heavy on the throttle, which is probably too much. So I'm adding a quart roughly every 3-4k.

 

Those are interesting and surprising "grades" as filters like WIX and Purolator PureOne (and it's clone Bosch) usually come out top rated.

I wonder how the OEM Jaguar filters stack up against top ranked aftermarket filters like a Purolator PureOne, especially for the 10k OCI recommended by the factory (X300)?

As pointed out in the first post, it is interesting to note the filter can size differences, although that doesn't really mean anything as long as it meets spec for installation. The OEM Jaguar filter for the X300 looks about twice as big as the spec'd Purolator PureOne for example.

Since the factory recommends a 10k OCI, I can only imagine that the OEM filter is up to the task, although I don't think I'd push it that far.

.

 

My 97 Expedition had a standard oil change interval in the handbook of 7500 miles. So my aspect with the implementation of synthetics, 12k-15k was not an issue and took it to 693k and still running. So a more performance and properly engineered Jag motor should easily go that far with new oil and oil tech available.

 

Please do, and please let us know

The interference point may be the stubs of the oil temperature and oil pressure
sensors.

Don't forget that the gasket on each has to be the same
inner and outer diameter within reason.

BTW, I had the Fram listed for the V8 in my hand three hours
ago. Despite the high ratings on the chart, not a chance I
would buy one. As compared to the Mann filter I put in a
couple of days ago, it weighed no more than a package of
cigarettes. (well close enough).

It was also listed as having a 8000 mile life rating.

 

I tend to use NAPA Gold in my cars because they are a good mix of cheap and easily available. I do 3-4k change intervals, mostly because I don't drive more than 6k per year per car. I currently am using Mobil 1 5W30 oil. I do the rebate promotions and between the filter under $10 and the oil costing me about $30 for 10qts (once in a while the oil for a change is "free"!) it's cheap.

My dad's friend who has passed would drive Lincoln Town Cars from new to about 500k miles then buy another one; he drove between 50 and 75k miles a year. He just got the motorcraft cheapie dino oil and filter changes every 4-5k; and he did 60k transmission fluid and rear diff, time based PS+brake+coolant changes; and he had several of his cars be original drivetrain with no rebuilds at 300k+ miles; the last one he had at time of death had 430k and never had the trans/engine/diff rebuilt. He was a special case as he drove old man style and highway all the time, but he maintained his cars to slightly better than factory intervals but with just cheapie fluids and filters and got very long life.

 

Yes, maintaining *all* of the fluids is the key.

A vehicle is a system, and all of the systems have to work.

Some people don't know the requirements exist, and some people
deny the requirements exist.

 

Exactly Plums +1...I paraphrased this in another thread about Smokey Yunick... "a car knows not who it is that made it, but how well it was maintained by who owned it."....he was a smart man.

 

The S6 filter was used by Jaguar for years --- my memory is it also fit the 12's. I can't remember ever having another filter size. Years ago some aftermarket filters had bypass failures -- I always used the OE anyway.

The new filter came out for the V8's. If you hold the OE filter and others -- one can feel the weight difference. It's not a place a worry about saving $ -- Think I paid $18.00 last time. AutohausAZ now sells the drain plug.

 

Just one point re the Napa Gold filters. They are made by Wix, and they even have the same part numbers apart from the first digit. The Wix ones, though, are often considerably cheaper, especially by mail order.

All my filters are Wix - oil, air, and fuel, bought online in quantity.

 

The OE air filter from Jaguar for my XJR is very tall w/ many pleats. I was always told it was made by Mann. If you purchase the current Mann aftermarket filter, it matches in construction and paper type but has fewer pleats and is not as tall. It's a quality replacement -- but the OE is a better filter. It's only seeing the OE that one understands that a difference is present.

With the miles driven and my dust free location -- I don't bother with the Jaguar air filter. For whatever reason Jaguar always had proprietary air filters -- And they charged a lot for them. I can't remember if the SC cars had a different part number -- size wise -- it's not a huge filter.

With the oil filters, I'm always afraid of them falling apart. This is not an uncommon problem especially with extended change intervals on cars with few miles put on them.

 

Just curious yeldogt, what do you consider extended change intervals? I'm curious as to how other Jag owners see this, simply because I don't baby my vehicles and still do the 12-15k oil changes (I do check it regularly). Especially since I just did a BG treatment also.

 

10k to 15k is too long IMO, to much blow by from the combustion process not getting caught by the filter after its reached its usable life. I'm a fan of about 7k Max. It's too cheap and too easy to do to let it go that long. Science can make it not break down but it won't stop the combustion process from entering into your oil. Bigger, better filtering media will get the contaminants out. Someone once said if your going to go 10k between changes at least throw a new filter on it at 5k.

 

Jag recommends 7500 from the factory and that was back in 99-03 era, I consider that a minimum. Oils and filters are better, synthetics and standard, thus I have never had an issue going 12-15k. Though my work trucks I changed the filter every 5-6k and added a quart because of the load I haul. I've taken 6 vehicles to 200k, 5 of those over 300k and 1 of those to 693k and sold all of them still running strong.