0W oil,too light????

[LandyAndy]

Hi guys
Back to the old oil debate,and I need answers tonite PLEASE.
Castrol are advertising a new synthetic oil with a 0W whatever rating.
The book of words says 5W/30etc.Now from my understanding the 0W is the cold viscosity,the 30 etc is the hot viscosity.
Im thinking that as my TD5 does 1km to and from work each day with little warmup the 0W maybe better than a 5W,especially considering our abundance of winter frosts.Thoughts please,hoping to collect some oil whilst in Perth this weekend.
Andrew

[Slunnie]

The dealer used to put 0-40 Mobil 1 into my TD5, though I now use 5-50 Mobil 1 also. Here is the oil chart from the workshop manual.
https://www.aulro.com/afvb/images/imported/2014/10/1414.jpg

[LandyAndy]

Hi Slunnie
Thanks
What are your thoughts?????Mine doesnt use a drop of oil,its clean after 10000ks,and 204000ks total(so definately remaining synthetics) Mine does a heap of short cold runs because my esky is too heavy to carry to work AND IM A LAZY FAT BASTARD :oops: :oops: :oops: :oops: .Is the 0W better off in short trips???? My thoughts are its like pumping water compared to diff oil,and the oil has its higher temp rating for normal use.
I spose Im just being a WALLY,I want to say my Disco has that new Castrol oil they say its the best they ever have made,and I want to line up the Mustang and Camaro at the lights. https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/

[DEFENDERZOOK]

<span style="color:blue">unless you can afford to take chances.....stick with what you know.....

the 5w 40 is what is recommended.....


and looking at that chart......10w60 is better if it doesnt get below 0 degrees......

so i would say no...dont use it.....its too thin.....</span>

[CraigE]

Andy,
The dealers say you can use anything from 0-10weight. The 0 is probablly a bit light in hot areas but may be ok down your way as it is so damn cold. I have been runnning 5w30 and are quite happy with that. I believe if you go up to a 10 weight or above it may effect the fuel consumption. Having said that I used to run 0weight oil in the V8 Commodore. An oil technician said it is better for highly stressed engines and if I could afford to run it run it, but would be better off running 5w Commodore, RR and Td5 and changing it every 5,000kms. The 0 weight oil gets a bit expensive at $65 for 5 litre every 5k. The tech I spoke to said even mineral oil is ok as long as you change it every 5000kms depends on what you can afford.

[rick130]

<div class='quotetop'>QUOTE</div><div class='quotemain'>The dealers say you can use anything from 0-10weight. The 0 is probablly a bit light in hot areas[/b][/quote]

why, oh why do these myths keep perpetuating ??????? :?

The xW part of of the SAE oil viscosity range relates to its pumpability at various temperatures below 0*C
If you had two oils, a 15W-40 and a 5W-40, at 100*C they must fall in the 12.5-16.3 centistoke range (a centistoke, or cSt is a measure of viscosity, and FWIW, most xW-40's are usually around 14-14.5 cSt @ 100*C)
Below 0*C, the 15W-40 is allowed a maximum pumping pressure of 3500cP @ -15*C, and the 5W-40 is allowed the same maximum pumping pressure at -25*C. If it was a 0W-40, it would only be allowed a maximum pumping pressure of 3250cP @ -30*C !
At 0*C, there isn't much difference between a 0W and 10W, and at operating temps, there is hardly any difference at all, in fact, if you look at the specs for various brands, I've seen some 0W-30's with a hot viscosity close to 12.5 cSt (the old Castrol SLX 0W-30, made in Germany) vs only around 10cSt for Mobil 1 10W-30 !

Please look at this chart.
https://www.aulro.com/afvb/

[Slunnie]

Originally posted by LandyAndy
Hi Slunnie
Thanks
What are your thoughts?????Mine doesnt use a drop of oil,its clean after 10000ks,and 204000ks total(so definately remaining synthetics) Mine does a heap of short cold runs because my esky is too heavy to carry to work AND IM A LAZY FAT bas**rd :oops: :oops: :oops: :oops: .Is the 0W better off in short trips???? My thoughts are its like pumping water compared to diff oil,and the oil has its higher temp rating for normal use.
I spose Im just being a WALLY,I want to say my Disco has that new Castrol oil they say its the best they ever have made,and I want to line up the Mustang and Camaro at the lights. https://www.aulro.com/afvb/ :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:
The problem with oil, is that most people say that I've been using X oil and its been brilliant and never had a problem. But really have no idea about what its been doing to the engine unless they change the oil or have an analysis done on it. The oils from 10 years ago are also not the same as todays so again its probably difficult to tell over the life of a motor.

My thoughts are to get an oil that covers the temp ranges of the engine that are possible from a drive to the snow, from the middle of the desert.

According to the chart that means 0-10w, and 40+. Seeing over 40 degree is definately a realistic thing, unlike seeing less than -20. I'm yet undecided on whats better for startup - thin or thick, especially in the light of Castrol Magnatec, though I would expect thin to be better. I would have thought startup protection would be big in your case.

If the oil is coming out squeeky clean, then it sounds like the engine is good. If its been run on Synthetics, then I would keep using synthetics to keep it clean, but still change the oil regularly.

At the end of the day, I would still run the 0w40 or 5w50 synthetic oil.

BTW, with regards to the new best ever castrol, I'm not convinced that their oils are better than everything else on the market. There are a few new oils that are currently out. The new Castrol does have the highest API rating available now, though I believe thats because the rating scale now has another level. I notice that Mobil 1 has also been retested to the same rating, and I've got no doubt that there are other oils on the market that are also of the same standard, or will be tested to the same standard.

[Ralph1Malph]

[quote]
Please look at this chart.
[/img]

I see...it all becomes clear now :?
After studying the chart kindly provided by rick130, I have learnt something .........
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Rick130 uses Mozilla Firefox 8O https://www.aulro.com/afvb/ 8O https://www.aulro.com/afvb/

Regards
Ralph

[amtravic1]

I have used Synthetic oils in my Rangie for nearly 350,000 kms. Dont know what was used for the first 100.000.
I have tried all brands in that time including the new Nulon type.
In my opinion the Castrol 10w60 was the best of them all.
I can only base this on the fact that I drive up to 1000 kms a week and the Castrol oil seems to keep good oil pressure for longer.
After I have changed the oil and filter the other brands seem to loose the ability to keep a high oil pressure after 3-4 weeks. (Nulon had a lower pressure even when it was fresh) however the Castrol fully synthetic in the grade I was using at least, lasted almost twice as long with good pressure.
As soon as the oil pressure drops a bit on the guage I try to change it, well with in a few weeks when I find the time.
Castrol is one of the most expensive but the extra cost seems justified in less oil changes.

Ian