Thread: Z9 oil filter

How much are you paying for your oil filter

I changed the oil and filter last week and from memory the filter 'ryco' was around $13....I think the salesrep mentioned the repco brand was around $9

What the go with a spin type filter

There isn't an adapter necessary - z9 and z1159 (Coopers number) or z89 (Ryco, from memory) share the same thread.( And, of course, I may be wrong but the last time I looked the Ryco catalogue listed them as the same thread size )

Although here is the relevant point - my Disco has the 2 inch lift on the springs. And that's where the problem lies. The Z9 is longer, and if it weren't for the lift I daresay it would get damaged if you did full articulation in the bush.

The good news is that I fitted a z9, and have done some interesting stuff with my disco - no damage yet. And, for $9, I carry a z9 spare.

as Langy said, the Z9 is the same thread but the length of the can means that the front diff will hit the bottom of the filter in hard off road conditions. Not maybe, will.
The bumpstop will compress more than 20mm to allow this. Some have discovered this to their peril. It can be fitted and the top of the diff ground to compensate but it will still contact.
A Z89 (the listed Ryco filter for a 300Tdi) is just a short version of the Z9. IMHO I reckon the OE ERR3340 filter (approx $14.50) is a better filter anyway, Ryco filters have only average filtration specs. A better filter in the Z9 size is a Purolator L3001, or even better is their Pure One (PL3001 ??)
If ultimate full flow filtration is required in a Z9 size filter, the Donaldson P169071 and Fleetguards equivalent are so much better in their filtration specs, flow rates and contaminant capacity than a Ryco or equivalent, but you literally pay dearly for them. (over $30 each)

IIRC one difference between the LR filters & the Z9 is that the LR filters have an anti-drain valve, while the Z9 does not. I don't remember the specs for the Z89.

Originally Posted by Bushwanderer

IIRC one difference between the LR filters & the Z9 is that the LR filters have an anti-drain valve, while the Z9 does not. I don't remember the specs for the Z89.

sorry, but the Z9 does have an anti-drain back valve and anyway, it is mounted vertically in a 300Tdi so you will only be supporting the oil column in the upper oil passages, the filter is always full.
BTW, most ADBV's aren't very effective, often verging on useless. (an effective ADBV drives the cost up too much )

If its the 300TDi your after then can't say for sure.. My '96 Disco V8i uses the Z89 (or variations of - Ryco, Coopers, others).
I do mine every 10,000km with every oil change and never have issues - (except the oil running running down my arm to my elbow - even after draining for an hour).

I use the Baldwin B74 for the oil, from memory $15. Will only use Fleetguard or Baldwin filters.

Originally Posted by rick130

sorry, but the Z9 does have an anti-drain back valve and anyway, it is mounted vertically in a 300Tdi so you will only be supporting the oil column in the upper oil passages, the filter is always full.
BTW, most ADBV's aren't very effective, often verging on useless. (an effective ADBV drives the cost up too much )

That's good! Thanks for the correction.