Depends on what your other car is. I wouldn't use it in a Rover unless I was in snow country in the winter.

 

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This part is not compatible with 1997 Land Rover Discovery.

 

So,
What is the veredict?
Are these filters safe on A Disco.........?

The compatibility tables says it does not fit.

 

Sorry but my PC won'rt show what you are looking at with that large post. Are you looking for an oil filter? From what source? Which web site?

This thread started with the Purolator 40316, which is a re-boxed MANN W950/4, which I run on my D1. There are other jumbo filters, from brands like Baldwin and Wix, the advantage is greater oil capacity. A filter should be priced where you are not tempted to run more than 5000 miles between oil changes. Many also use the Mobile 1 filter. There are all sorts of reports on types of bypass valves, etc. The Fram seem to be more cardboard and and ad dollars. But the main thing is a new filter every oil change, and don't make Rover wait. The 7500 - 15,000 mile changes are a product of the ad department. The diesel rated oils have more cleaning and Rotellla has lots of ZDDP which is good for flat tappet engines. It is not modern engine. It is a 1963 Buick Skylark engine with electronics added to satisfy the various regulatory agencies. Back in the 60's people changed oil every 1000 - 3000, and a truck was considered worn out at 50,000.

 

No they don't fit. I actually work for MANN. We had 1 million filters we couldn't sell, so we setup a deal with purolator to rebox them and sell them in the states to dumbasses who think they will fit in their cars. But due to low sales I was laid off and abandoned by MANN in New Jersey, left with only a shipping crate full of useless huge oil filters and a strap wrench. But with photoshop and a laptop I was able to go on many forums and get people to believe this filter fits on Landrovers and audis. Little do they know that the filter will cause their engine to explode with the force of 10 killotons of TNT if used for over 4999 miles (MUHAHAHAHA).
Vunce all mine vilters are zold I Ville retrn to zee Fazaland a national hero, Having decimated all zee capitalists ingeens!!!

 

Well I went to pick up some of the Rotella 15w40 and order one of the two different filters L40316 (High bypass pressure) or L40107 (low Bypass pressure)

I was going to go with the Low pressure filter.
However after the parts guy looked it up it appears that they are discontinuing that particular filter and they cannot order them anymore.
I did manage to find a couple online but they were north of $20

The High pressure filter is still available so that's the one I went with.
looks like that may answer the question as to which one to get unless you decide on another brand.

 

and So I.... I ordered 1 just now on amazon... it is the W950/4 for $12 each .... I also have been running T6 Rotella with a 3001 filter... one thing though... at hot idle ive noticed around 8-9 but fluctuates up around 10-12 which it used to always do intil last oil change... its always been around 10-12 when hot idle and 40+ around 2000rpm ( hot.. ) when cold its idling I think I remember around 30+ but Ill get more accurate data..... Im in south florida where it rarely gets cold at all so Im going to bump up to 15-40 Rotella T and see if my hot idle will increase... I dont like it low around 8-9... it also is a little erratic occasionally when idle but rock solid once driving.... and with this new MANN 950/4 and Rotella T well see what happens! hopefully not POW! lol

 

Keep in mind that with a higher bypass pressure your engine can be oil starved for a longer period of time if conditions are less than ideal.
In fact, given the Rover V8 lubrication system specs, your engine could be oil starved even under near ideal conditions if the filter is dirty enough.

 

Ill keep an eye on it... I change oil every 3500 miles and when I first got it I changed it to rotella T6, ran it 600 miles and changed again just to get some of the gunk if their was any, out of it from prev owner... it was in ok condition but did have some issues mostly just time for maintenance however I didnt know previous owners oil change habits... I just know what I do... lol I may goto Rotella T though just because it never gets cold here and to my texas standards, it doesnt get hot here either in S Florida lol

 

I thought the bypass valve did just that, bypass the filter media depending on pressure drop, blockage, etc. So a dirty filter won't stop oil flow, it just stops the filter process. The bypass valve also operates at WOT accelerations, racing, etc. I think a filter that is clogged AND has a stuck valve would starve the oil.

So with a Mobile1 filter run until clogged, or any other brand, continues to flow unfiltered oil. But with the price you paid for the Mobile 1 and the synthetic oil you keep driving for another 15,000 miles with no filter....

Good quality filter and oil, and change early and often like voting in Chicago. Rover says under certain arduous conditions oil may have to be changed daily. Sounds like fun to me!

Exactly how does a bypass valve work? - Bob Is The Oil Guy

Pix of arduous conditions and results of poor oil change habits combined with blocked PCV system.

Fuel for thought - does a high cleaning oil Like Rottela, in an older engine, remove so much sludge that the filter media becomes clogged early and the filter stays in bypass mode?