High Temperature High Shear (HTHS): What is it and why is it important?

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Learn how high temperature high shear (HTHS) is fast becoming associated with increased fuel efficiency when developing new high performance, low HTHS viscosity engine lubricants. Also, learn about testing methods, including SAE J300 and ASTM D4683, and how an oil's viscosity is classified.

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28 апр 2019

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Комментарии : 18

@cujet Год назад

The claim made here is that lower HTHS is a good thing. That's not true in a great many normal situations. In any given oil grade, the higher the HTHS, the better that specific oil protects at 150°c (think ring packs, rod bearings and turbochargers) when compared to oils with lower HTHS.

@MindHunger 7 месяцев назад

I lost a Ford 3.0L engine because the oil I was using was low HTHS. I saved maybe 3% in fuel economy and ended up having to buy a new car.

@zzman5306 4 месяца назад

So in order to keep good protection better base oils and add packs need to be used.

@faustoborja1079 Год назад

1% to 3% of fuel savings at a cost of rapid engine wear 🤣🤑🤑

@jachpriboy8989 Год назад

pure nonsense 🤣

@FeelFree3 2 года назад

So lower HTHS viscosity doesn't affect engine protection?

@zackz1260 Год назад

Lol no it 100% does

@FeelFree3 Год назад

@@zackz1260 Thanks, somehow this video said the opposite and focus on lower HTHS to save fuel.

@tcfullback18 5 лет назад

I believe you meant to indicate ASTM D4683 in the above write-up.

@LubrizolAdditives360 5 лет назад

You are correct, thank you for notifying us of this. The description has been updated.

@AlexandreOliveiraAlex 2 года назад

Beautiful

@Driving_Somewhere 2 года назад

Is there a direct correlation between HTHS and engine wear?

@Supersupra87 2 года назад

Most racing oils have higher HTHS for a reason.

@jubblybits6155 Год назад

Absolutely

@averyalexander2303 7 месяцев назад

Yes. Inadequate HTHS for the application will result in higher wear, but a higher than required HTHS won't necessarily reduce wear. If you look up "HTHS wear graph", you'll see that the wear rates of various components often increases sharply when HTHS drops below around 2.3-2.6 and level off at an HTHS of around 2.9-3.5, but again, the exact HTHS requirements will vary depending on the application.