Thread: Buying engine oil

Originally Posted by Lukeis

Rather than changing all the oil would there be any benefit to changing the filter more frequently?
Cheaper and better for the environment but I suppose the question is how effective is the filter
Really?!

No. The oil is more important than the filter, plus filters improve filtering capability as they capture content until the point they’re saturated and lead to restriction. Remember the old days when you did oil every 5,000 and filter every 10,000km? Oil was the weak link. I have some good material somewhere of a filter’s filtering capability versus captured content versus age and how changing filters too often can have a negative affect overall.

Hi,

When I first got my vehicle new 2.7 MY11, it came as a Corporate buy with "Free" Servicing for 3yrs at 24000km Intervals.

Ha Ha. Had to pay for the intermediate "Oil Service" that was strongly recommended by the Dealer.

However, when I look at the <JLR 14 70 21_1E> Discovery 4/LR4 MY11, Non 3.0TDV6 Maintenance Check List the recommended service intervals are for quote "normal driving, road and climatic conditions" the following is recommended.

NORMAL DRIVING CONDITIONS

Oil Service @ 12000km
A Service @ 24000km
Oil Service @ 36000km
B Service @ 48000km



and

When I look at the <JLR 14 68 21_3E> Discovery 4/LR4 Non 3.0 TDV6 MY11, ARDUOUS, Maintenance Check List the recommended service intervals are for quote "arduous driving, road and climatic conditions"

ARDUOUS DRIVING CONDITIONS
Oil Service @ 6000km
A Service @ 12000km
Oil Service @ 18000km
B Service @ 24000km

10000km interval oil servicing seems a reasonable compromise especially when LR recommend higher frequency of servicing may be necessary if:=

"the vehicle is subject to stop/start driving, extremes of temperature, dusty conditions, off road driving or frequent towing of trailers".

Seems to me that LR really haven't specified or recommended long service intervals any way?????

Originally Posted by Lukeis

Rather than changing all the oil would there be any benefit to changing the filter more frequently?
Cheaper and better for the environment but I suppose the question is how effective is the filter
Really?!

No, as Jeff had already said, although that's not how oil/hydraulic filters work, unlike air filters.

The bottom line is that full flow oil filters are pretty coarse, there is a stack of stuff in here by isuzurover on filtration.
Ben is a filtration research engineer, do a search, you will learn a lot.

Anyway, full flow filters really only catch big stuff, generally their nominal filtration is around beta2=25, ie. they capture 50% of 25 micron particles in a multi pass test.
Soot is sub micron in size...

The only decent oil filtration is performed by a by-pass filter, something like the centrifugal one in the TD5.

The most important filter is the air filter, and that is that one that becomes more efficient the more heavily loaded it becomes.
It then becomes a trade off between pressure drop and air flow.
Any problems there and your engine is toast.

Oil, air, pfff, semantics
Well I knew I’d read studies somewhere lol. Applicability somewhat challenged.

Originally Posted by DiscoJeffster

Oil, air, pfff, semantics
Well I knew I’d read studies somewhere lol. Applicability somewhat challenged.

Originally Posted by DiscoJeffster

Hi Alan,
I'm curious. What is it you hope to achieve by servicing every 10K KM? I'm being honest not facetious with the question. My vehicle, by the previous owner, was serviced by the dealer intervals for its first 200K KM. I'm now running arduous servicing intervals as I tow and go off-road, so I'm changing it around 10-12K KM. I also use the enviro c4.
What I'm getting at is you choose to spend money servicing it to make it last I presume, but I'm curious of your opinion of value? Is this based on a certain number of KM you expect to get out of the engine? What is your expectation, honestly? What KM would you consider you've done ok and your interval was worthwhile? I ask this as so many people criticise the factory intervals but have no clear expectation of what they hope to achieve, other than a perception that the factory is wrong? So is 200,000km good? 300,000km?, 500,000km?

Cheers,
Jeff

I also do 10,000km intervals in my 3.6 tdv8. Originally JLR prescribed services at 11,000km, but later changed to 24,000km for the same engine. I took a conservative approach as oil is cheaper than repairs.

Saw this in local Repco
The label says it suits Landrovers*

Yes - as I said on this post: Buying engine oil



The specs are here: SYNPOWER FE 5W-30 - Valvoline SynPower