Was looking at an oil with a Viscosity Index of 192. Is that high? Is that good? What is a "low" VI? And what does it matter, for optimal oils and comparisons? Thanks!
Is 192 a high VI?
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Agree, 192 is relatively high for most grades.
There are/were 0w20s with VIs over 200, but those are becoming more scarce.
There are/were 0w20s with VIs over 200, but those are becoming more scarce.
Originally Posted By: volk06
Yes that is relatively high. Most 5w30s oils have a VI of 150-175ish. 5w-20s are usually a little lower due to less VII. It really depends on the weight of the oil.
Is it good for a 0W-40? I ask because I am thinking of going 0W-40 or GC 0w30 for the Volvo, yes, year round.. and one has a VI of 192, GC doesn't but is otherwise perfect..
Yes that is relatively high. Most 5w30s oils have a VI of 150-175ish. 5w-20s are usually a little lower due to less VII. It really depends on the weight of the oil.
Is it good for a 0W-40? I ask because I am thinking of going 0W-40 or GC 0w30 for the Volvo, yes, year round.. and one has a VI of 192, GC doesn't but is otherwise perfect..
Has the timing belt been changed recently?
A 192 VI is high, and yes it is a positive attribute of an oil. But what's more important is how much of that virgin VI is retained in service. If the high VI is acheived with high molecular weight shear prone polymer thickers as is the case with many 5W-50 oils, the actual in service VI may only be in the 170s.
Don't keep it a secret, what's the oil with the high 192 VI?
Don't keep it a secret, what's the oil with the high 192 VI?
Originally Posted By: CATERHAM
Don't keep it a secret, what's the oil with the high 192 VI?
Yes, inquiring minds want to know.
Don't keep it a secret, what's the oil with the high 192 VI?
Yes, inquiring minds want to know.
Originally Posted By: CATERHAM
A 192 VI is high, and yes it is a positive attribute of an oil. But what's more important is how much of that virgin VI is retained in service. If the high VI is acheived with high molecular weight shear prone polymer thickers as is the case with many 5W-50 oils, the actual in service VI may only be in the 170s.
Don't keep it a secret, what's the oil with the high 192 VI?
How much do the ow-20's shear? Like the Mazda?
A 192 VI is high, and yes it is a positive attribute of an oil. But what's more important is how much of that virgin VI is retained in service. If the high VI is acheived with high molecular weight shear prone polymer thickers as is the case with many 5W-50 oils, the actual in service VI may only be in the 170s.
Don't keep it a secret, what's the oil with the high 192 VI?
How much do the ow-20's shear? Like the Mazda?
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