Engine Oils etc etc etc

[Nizsafari]

Maybe this has been covered before but hey...

Question: what is the difference between a 15w-40 Regular engine oil and a 15w-40 Diesel engine oil apart from the extra $$$???

Is anyone using additives like Motorup/Slick 50/Moreys/Gunk/X-1R/BiTron
Is anyone using a K&N or Foam air filter as apposed to paper?
Does anyone use OIL (edited) Additives and how regular do you use them?
Does anyone use a Fuel additive, which ones and how regular do you use them

Cheers is advance

[Cloggy_NZ]

This thread might shed some light on your questions: http://forums.overlander.com.au/viewtop ... d01b691196
There are a few links in there to other sites and the discussion seems to focus on Nissan diesels.

[KiwiBacon]

Diesel oils are often higher in detergents to keep soot particles suspended until the filters can take them out.
I wouldn't put a K$N on any vehicle I own, I think their filtration is crap.
Never bothered with a fuel additive.

[albundy]

I use fuel additives (Morseys) only to keep the algae down and injectors clean. Use a paper filter, but also use a foam pre-filter in the snorkel. keeps the paper one cleaner. I also use Morseys oil stabiliser in the engine oil, diffs andgearbox. I always use the same brand of oil as I do with fuel. And I change filters and oil every 5000k. Use only fram oil filters.

Al

[Bulletproof]

I think the main thing about oil rather than additives is to change the oil often. I do an oil and filter every 4500 ks.
I have done this since new and I have now done 75000 ks and the oil is still reasonably clear after 2000ks

Cheers Richard

[Nizsafari]

Sweet..Cheers for the info....any one else????

[KiwiBacon]

Oil change intervals depend on how quickly your engine contaminates the oil and what sort of filter you have.
My Isuzu has a bypass oil filter, it's oil gets changed every 10,000km by me. The Aussie army changes theirs every 16,000km.

My work car (Nissan YD22) has factory specified oil changes at 20,000km intervals. Many other modern diesels are longer still between changes.

[GrumpyOldB]

Nizsafari: A 15W-40 petrol oil could be very similar or even the same as a 15W-40 diesel oil. It all depends on the other specifications it meets.

Check back to what specification oil your Nissan was meant to have when new, and try to get as close to it as possible.

Match the viscosity, like SAE 15W-40, SAE30 etc and the performance rating which is usually in the fine print on the back of the pack. Performance ratings are done by the API and could be CC or CD if it is an older engine. A C rating meand it id designed for diesels. Petrol engine oils are rated on a different system, and can have API SF, SG etc. But most oils are rated for both petrol and diesel, so it might say API SG/CC.

If yours is non-turbo, a car oil that is rated for diesel use should be OK.

All oils, petrol or diesel contain detergents to try & keep the dirt from sticking to the parts, and diesel oils don't always have a lot more detergent. They may have more dispersant additive - which is the one that keeps the soot suspended in the oil.

It might be easiest to find the right oil using a lube selector like http://www.shell.com/home/page/nz-en/sh ... _1128.html

And like Bulletproof says - forget the additives. Spend the money on more frequent changes. Fancy filters only remove the soot. They don't remove acids and tars. Outfits like the military and truck companies that do long drain intervals have the oil analysed to make sure it is good enough to keep using. We can not easily do this, so it's safer to change it.

[tweake]

additives.... some of the additives work very well. however watch the cost and how long it lasts for. some cost $40 and only last 10,000km. that makes for one expencive oil change. it would be cheaper to run a better quality oil.

[mudgripz]

Have always done oil and filter changes at 5k - best thing you can do for your diesel. Have tried Powerup in the engine oil which lubed motor well - took sharpness off motor sound - also good for diffs, transfer case etc but not isuzu gearboxes as it can interfere with synchro. Had a K&N on my last isuzu 2.8 which was tuned to 155hp and the filter was good - best in recent aussie test.

[Bulletproof]

I own one of the latest Honda Euro L 2.4 vtec

The workshop manual says for normal conditions in NZ . Change the oil every 10,000ks with synthetic blend

If you do mostly 5-10k runs ,this is considered extreme driving conditions so oil changes need to be reduced to every 5,000 ks

Another thing to take into account

Cheers Richard

[tracta]

hey have a question ( sorry for the thread jack) i have a 91 terrano with a 2.7 td. did an oil change and put 15w 40 in it, it says its good for api ch-4, cf, sl. is this ok for the turbo ? didnt think about it at the time, cant see anywhere on the container that says it isnt. advise/recommendations?

[KiwiBacon]

Had a K&N on my last isuzu 2.8 which was tuned to 155hp and the filter was good - best in recent aussie test.

Do you have a link to this test? All the ones I have seen rate K&N worst for filtration.

[Windsock]

Had a K&N on my last isuzu 2.8 which was tuned to 155hp and the filter was good - best in recent aussie test.

Do you have a link to this test? All the ones I have seen rate K&N worst for filtration.

Yeah, I'd be interested in reading some independent test results for the reusable filters too. Am trying to figure out alternatives to the small airbox I have. Looked at the Fram Airhog filters for a while till read a few posts to this list (by you I think Kiwibacon) about their relatively poor filtration performance.

[tweake]

hey have a question ( sorry for the thread jack) i have a 91 terrano with a 2.7 td. did an oil change and put 15w 40 in it, it says its good for api ch-4, cf, sl. is this ok for the turbo ? didnt think about it at the time, cant see anywhere on the container that says it isnt. advise/recommendations?

ch-4, cf ? which one is it?

in any case its fine for that motor. ch-4 is the better one, handles soot better than cf.
only thing is if 15w-40 will suit your temp range where you live.

[NJV6]

Have a search on Outer limits about K&N..... Sure they would win a test in airflow..... But at the expense of filtration.

[tweake]

on an older motor proberly not a big problem useing K&N airfilters on diesels. however with modern electronics, namly MAF sensor, you need to keep these clean as possible. i would not use ANY foam/cotten filter on them. the MAF controls everything, fuel, emmision system, turbo system etc. if it goes faulty the motor can go seriously crook and even end up melting pistons/head.

[mudgripz]

Can't remember where I found K&N filtration test. Couple of years ago some Aussies from Isuzu club took tuned trucks and filters to dyno shop and K&N showed best performance increase of aftermarket filters - about 2-2.5kw from memory.

From experience, I ran a K&N for about 100,000ks on my last truck and it was very good - will get another for new truck. Alot of Aus/NZ isuzu owners run them and have never heard of any issue - regarding filtration or anything else - all good results. Only thing with K&N as with Unifilter - another good product - is you need to re-oil regularly and keep it clean to get performance advantage. When on 4wd club trips with convoys travelling known long dusty roads, I occasionally carried an old cardboard filter and put that in for a while to save having to clean the oiled filter afterwards.

I do know some of the very cheap after market filters can come apart over time, with bits of filter entering the turbo with fairly colorful outcome!!

[KiwiBacon]

Had a K&N on my last isuzu 2.8 which was tuned to 155hp and the filter was good - best in recent aussie test.

Do you have a link to this test? All the ones I have seen rate K&N worst for filtration.

Yeah, I'd be interested in reading some independent test results for the reusable filters too. Am trying to figure out alternatives to the small airbox I have. Looked at the Fram Airhog filters for a while till read a few posts to this list (by you I think Kiwibacon) about their relatively poor filtration performance.

Sink your teeth into this one.
K$N comes out at or near the bottom many times. Except for categories like "total dirt passed' where it gets the most.
http://duramax-diesel.com/spicer/index.htm

I once fitted one to a tractor, I'd never do it to any engine I owned or cared about.

[KiwiBacon]

I own one of the latest Honda Euro L 2.4 vtec

The workshop manual says for normal conditions in NZ . Change the oil every 10,000ks with synthetic blend

If you do mostly 5-10k runs ,this is considered extreme driving conditions so oil changes need to be reduced to every 5,000 ks

Another thing to take into account

Cheers Richard

That's interesting. More interesting is that honda don't show service intervals on any of their major websites.
Even my 1998 shopping basket (1.8 petrol) recommends oil changes at 15,000km intervals.
Severe service doesn't alter that interval.

BTW the Aussie army don't do oil analysis on the engines I mentioned. 16,000km changes and lots of abuse in between. You can almost hear the oil companies crying with the sales they miss out on.

Does anyone else think with the current oil prices, that oil companies should have to buy the used oil back off us?

[mudgripz]

Interesting looking at test reviews re K&N, Amsoil, Unifilter and other performance filters - there is as much argument about filters as for favourite calibers for rifles!!

What I can advise from many years experience in our Canterbury 4wd clubs, is that alot of clubmates use aftermarket filters including K&N and Unifilter when performance tuning trucks, and have never heard of a problem arising from either make. I know also major manufacturers like Nissan and Chrysler list K&N as part of aftermarket performance kits for their vehicles - a very sound recommendation.

However, in one filtration test review it was noted the K&N was tested with dust sample types more often found in a commercial agricultural setting than on the road, and the filter did not perform so well. I doubt aftermarket performance filters are actually meant for this application where the need is on max filtration and less on max performance, but the point remains - and you may well be right kiwibacon in avoiding K&Ns/unifliters etc on such machinery - or for drier, heavier dust, 4wd environments.

But from our Canterbury club experience, - and we do alot of trips in Canterbury, into the central mountains, to the coast, to nelson/marlborough etc - the K&Ns and Unifilters etc have done very well for us on our trucks to date.

[KiwiBacon]

I know also major manufacturers like Nissan and Chrysler list K&N as part of aftermarket performance kits for their vehicles - a very sound recommendation.

Have you got a link for this? It's something I've never heard of before.

Do any of these people you know running K$N filters ever get oil analysis done? A vital part of oil analysis is the silica content, basically how much dirt is getting into your engine through the air filter. The test results are particularly damning in this respect.
Fine dust also eats turbo compressor wheels. I have had to rebuild my engine once due to a failing air cleaner, it took out the turbo compressor wheel too.
All my vehicles (even the shopping basket) spend a considerable amount of time on gravel roads travelling through fine dust, at this time of year the amount of grit spread on the roads means even tarmac roads are a constant source of fine dust.

[mudgripz]

Nissan and Chrysler's inclusion of K&Ns in factory after market performance kits came up I think in American Corvette club material. They use alot of aftermarket performance kits in the states - and alot of K&N product.

Doubt local Canterbury 4x4 club membership do much oil analysis testing. Haven't heard of it - we're not quite that scientific. If filters work well over time for our trucks, that's it really. But for your gravel roads with alot of dust, focussing on max filtration sounds a good idea. I'm looking forward to someone inventing a self-cleaning oil filter..

[fishjoe]

Hi guys,

There is an oil thread on patrol4x4 contains loads of infomations.
http://www.patrol4x4.com/forum/showthre ... light=oils

For anyone interested can have a look.

Joe Yu

[safari_mulisha]

i used a k&n on my burn out car but now run an apexi as the k&n was to small

unifilters get gaps under the foam and need the be installed with grease around the edges