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Engine Oil discussion thread
- Thread starter Touge
- Start date
Thanks cardinalsin thanks for getting back to me on this subject interesting info.
Sorry can't help you there. I tend to agree with Stace the engineers know what they are doing when developing the oil. And I'm guessing they work closely with each car manufacturer to make sure it is absolutely right. At the end of the day they do not want any warranty claim do they.
The i20N has combined gearbox and LSD oil. The i30N has them separate.
Manufacturers can specify lighter engine oil for a country where fuel economy is of prime importance. I think it was the ND MX-5 2L that was a good example with lighter oil specified for the USA than for Australia and Europe for that very reason. We always used to get a choice so we could run thinner oil in the winter and thicker in the summer but now it seems that doesn't matter anymore and you have to use the same spec in Siberia as in the Sahara Desert.
It's a bit like trusting a doctor to do the right thing when you know they are restricted and these days, virtually the sales outlet for the pharmaceutical companies and hospitals. For me 0w-20 is too thin, especially here in Australia and mine will be getting 5w-30 when the warranty runs out. It will be vital to gently warm it up to be safe but I always do anyway.
Interesting reply thanks cardinalsin really didn't know that just thought we all used the same oil.
Thanks again for the info on lsd and gearbox oil Interesting to know it's all the same oil for both the diff and the rest of the gearbox like a more average cars.
I have to say I agree with @Cardinalsin that these modern thin as water oils have only been developed to reduce drag in the engine which therefore reduces emissions through less fuel being burned, which is a legal requirement manufacturers must meet to satisfy ever tightening emissions standards. This also helps with auto stop/start, like in the i20N. Then they have to go and add LSPI additives which is the result of using such thin oil in the first place.
/
He definitely knows his stuff.
Thanks again enjoyed it.
Thanks for the video you posted can't protend I fully understood it but I was thankful he didn't make it into a maths lesson would of fallen asleep if he did.
He definitely knows his stuff.
Thanks again enjoyed it.
There's a really good you tube channel called "The Car Edition", there's loads of JLR engines is a worse state that the prevous video
It's pretty significant because it's the first example I know of where a manufacturer, in this case GM, decided to change, and in no small way, the running temp viscosity of the recommended engine oil in response to experienced bottom end bearing damage in engines originally specced to run a light oil, specifically 0w-20. It is a tacit admission that the "lighter" engine oil is not seen by them as adequate to protect their engines under load. There will certainly be some who see this as a vindication of their opinion on what oil ought to be used in high performance engines.
Engines are running hundreds of hours of very hard endurance testing on engine test benches during their development. With the oem specified oil. I am pretty sure that hyundai run such tests, too.
After finishing the test, the engines get disassembled and pistons, bearings etc get inspected.
why shouldn't hyundai do it the same way?
After finishing the test, the engines get disassembled and pistons, bearings etc get inspected.
why shouldn't hyundai do it the same way?
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Don't you imagine that GM did the same with their engines but still got failures in the real world compromising reliability for economy?
I posted the video purely to share the information rather than to reignite a controversy.
Many here I'm sure are aware of the engine R&D process and you would expect GM to have done their due diligence, but, according to the video at least, they have decided to move away from 0w-20 when engines suffer damage. Whether they blame the oil entirely or a combination of factors, it remains that they have seen an increase in oil viscosity as a solution or part thereof.
Now, as for my own opinion which is naturally based on my interpretation of the evidence, modern light engine oils exist for political and in turn legal (emissions) reasons, not because they promise any great advancement in oil technology in terms of engine protection, durability or cost savings. Given modern bureaucracies attitude towards fossil fuels and motoring enthusiasts in general, I'd say they are far more concerned with satisfying climate, emissions and social agendas than whether oils are providing the utmost protective qualities and prolonging the life of internal combustion engines.
But that's just what I think.
The arguments with co2 etc are correct.
Problem is that during R/D of a modern engine, thicker oils are not tested.
That means that we don't know how oil pressure driven actuators of the valve train behave.
Also bearing clearances...
Of course a thicker oil COULD help in some cases but also it COULD Bbe worse in other meanings. We just don't know and of course we WON'T ever know. We JUST can believe.
Under normal use (incl also some high load and high rev) on country roads, 0w20 will always we sufficient.
Problem is that during R/D of a modern engine, thicker oils are not tested.
That means that we don't know how oil pressure driven actuators of the valve train behave.
Also bearing clearances...
Of course a thicker oil COULD help in some cases but also it COULD Bbe worse in other meanings. We just don't know and of course we WON'T ever know. We JUST can believe.
Under normal use (incl also some high load and high rev) on country roads, 0w20 will always we sufficient.
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Ok, offering those tests as evidence of the efficacy of 0w-20 is pure anecdote and something you choose to believe on faith. How do you even know what grade of oil is used in them? You don't.
EDIT. Oh, clearly you saw that coming and edited references to the German stress tests out of your comments.
Anyway, let's just leave it there. All the best to you.
EDIT. Oh, clearly you saw that coming and edited references to the German stress tests out of your comments.
Anyway, let's just leave it there. All the best to you.
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