Lower viscosity lubricant may help engine temperature?
Discussion
Reading someone's blog about testimony from changing lubricant to the less viscous lubricant 10w-40 than the car manufacturer recommended of 20w-50, can help a bit engine temperature.
This change helps engine temperature indicator never reach half of indicator read while standard lubricant can exceed the half level.
Anyone have similar experience?
This change helps engine temperature indicator never reach half of indicator read while standard lubricant can exceed the half level.
Anyone have similar experience?
More likely the 10-40 is a more modern oil which has better heat dissipation than the older oil. Redline oil was at one point thought to be a better lubricant than others because for the same grade, some bike engines ran cooler with Redline but it was later suggested that it simply dissipated the heat better.
Who knows, without a lab to test and 3 months to play around, just stick in the oil recommended by the manufacturer.
Who knows, without a lab to test and 3 months to play around, just stick in the oil recommended by the manufacturer.
I've tried this, copied from my blog -
The conrod car has had an oil change & I was astounded by the difference. It was running on a semi synthetic 10w40 and is now filled with Royal Purple fully synthetic. The oil temperature used to read around 112 degrees celcius on the motorway, up to 118 if I overtook 'enthusiastically' and then take ages to cool down again. Since the oil change I took it on a long run up north and the oil never got above 110 degrees and would cool much quicker than before.
hth.
The conrod car has had an oil change & I was astounded by the difference. It was running on a semi synthetic 10w40 and is now filled with Royal Purple fully synthetic. The oil temperature used to read around 112 degrees celcius on the motorway, up to 118 if I overtook 'enthusiastically' and then take ages to cool down again. Since the oil change I took it on a long run up north and the oil never got above 110 degrees and would cool much quicker than before.
hth.
So, for no other changes except the oil, you get a reduction in oil temperature?
Is this because the oil you have chosen is removing less heat from the engine than before?
Or is is because it is loosing more heat to the cooler than before?
I too have experienced this and I've been chewing on this food for thought for a while.
Steve
Is this because the oil you have chosen is removing less heat from the engine than before?
Or is is because it is loosing more heat to the cooler than before?
I too have experienced this and I've been chewing on this food for thought for a while.
Steve
Thanks for sharing.
This is logically acceptable, the lighter oil usually has better coverage lubricating parts heavier oil can't cover, or takes more time to lubricate the whole parts.
Another heavy-duty-car's driver suggested me the opposite, he uses lubricant heavier or more viscosity than standard, he believes this gives more perfection protecting the engine, provided periodically oil filter changed together with the oil at once.
This is logically acceptable, the lighter oil usually has better coverage lubricating parts heavier oil can't cover, or takes more time to lubricate the whole parts.
Another heavy-duty-car's driver suggested me the opposite, he uses lubricant heavier or more viscosity than standard, he believes this gives more perfection protecting the engine, provided periodically oil filter changed together with the oil at once.
There might be wary of using the lighter oil that we need to check periodically the safe level of lubrication in the engine. The lighter oil tends to dissipate relatively easy in the heat, although the best quality oil has better resistance on the weakness or even without this weakness at all.
More viscous oils (50-60 weight) retain heat more than the less viscous ones do.
That said, they also tend to have a higher High Temp High Shear value, which is better to have than not.
What car is this proposed oil grade change for?
It's been suggested the M-Series engines are design flawed, and using the thicker oil to compensate for.
Subaru on the other hand have a 4th bearing issue, from oil starvation, so it escapes me why most tend to run with a 50 weight, when a 30 or 40 weight would seem more logical for daily driven.
Tracking the car is a different matter, and if prolonged high rpm is envisaged, then the higher HTHS value comes into play, but then so does oiling, hence why it might be worth adding or upgrading the oil cooler first and foremost.
That said, they also tend to have a higher High Temp High Shear value, which is better to have than not.
What car is this proposed oil grade change for?
It's been suggested the M-Series engines are design flawed, and using the thicker oil to compensate for.
Subaru on the other hand have a 4th bearing issue, from oil starvation, so it escapes me why most tend to run with a 50 weight, when a 30 or 40 weight would seem more logical for daily driven.
Tracking the car is a different matter, and if prolonged high rpm is envisaged, then the higher HTHS value comes into play, but then so does oiling, hence why it might be worth adding or upgrading the oil cooler first and foremost.
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