What is the HTHS test?
HTHS measures the viscosity (resistance to flow) of an engine lubricant at elevated temperatures (150°C) under constant shear, simulating the narrow tolerances and high speeds between moving parts in a hot engine.
What is HT and HS viscosity?
What is HTHS? HTHS ( High Temperature High Shear) viscosity is the way we measure the ability of fully heated oil (150°C) to run efficiently between the narrow openings of fast-moving engine parts: for example, between piston ring and lining, valve train, gearwheel contact points, and so on.
What is low HTHS?
The lower the measured number, the lower the HTHS viscosity of the oil and the higher the anticipated fuel efficiency benefits. HTHS viscosity is measured in milliPascal. second (mPa. s) but is also commonly referred to in centipoise (cP).
What is high temperature high shear viscosity?
WHAT IS HIGH TEMPERATURE HIGH SHEAR (HTHS)? HTHS viscosity is the way we measure the ability of fully warmed (150°C/302°F) oil to flow within the narrow confines of fast-moving engine parts.
What is high Hths?
HTHS measures the viscosity (resistance to flow) of an engine lubricant at elevated temperatures under constant shear, simulating the narrow tolerances and high speeds between moving parts in a hot engine.
What are saps in oil?
What is low-SAPS Engine Oil? Low-SAPS Engine oil is an oil that has a low content of ash levels created from the burning of sulphated ash, phosphorous and sulphur which the acronym SAPS refer to.
What does Hths mean in oil?
high temperature high shear
The focus on high temperature high shear (HTHS) is gaining momentum as it is regarded as the parameter of the viscosity grade classification that best predicts fuel efficiency and more accurately mimics engine lubricant behavior in increasingly severe operating conditions.
What is high HTHS oil?
How do you read oil viscosity?
The lower the number, the less the oil thickens in cold weather. The numbers after the “XW” indicate viscosity at 100 degrees Celsius and represent the oil’s resistance to thinning at high temperatures. For instance, oil with a 5W-30 grade thickens less than oil with a 10W-30 grade in cold weather.
Is low SAPS oil better?
You need to use Low SAPS oil because Sulphated Ash, Phosphorous, and Sulphur are all substances that can build-up and block your vehicle’s DPF. This is why it is important to have an oil that is low in these substances, to avoid blockages.
What does low SAPS C3 mean?
LOW SAPS C3 C3 oil can have a 5W-30, 5W-40 or 0W-30 viscosity. In this example, clever oil technology has allowed the inclusion of the C2 performance level.
How is viscosity measured?
Its unit of measurement is dynes per square centimeter (dynes/cm2). The fundamental unit of viscosity measurement is the poise. A material requiring a shear stress of one dyne per square centimeter to produce a shear rate of one reciprocal second has a viscosity of one poise, or 100 centipoise.
What is a good Hths number?
The unit for measuring HTHS is mPas (millipascal second). If the HTHS value is above 3.5 mPas, the HTHS viscosity is to be classified as normal. An HTHS value below 3.5 mPas is referred to as a reduced HTHS viscosity. Engine oils with reduced HTHS viscosity were developed for special engines.
What is a high viscosity number?
What do the viscosity numbers mean?
So what do the numbers mean? The number preceding the W designates the viscosity at a low temperature, and the number following represents viscosity when the engine is hot. For example, a 10W-30 motor oil means the viscosity is at 10W when the engine is cold and 30 when the engine is hot.
What is low SAPS C3?
LOW SAPS C3 C3 oil is usually associated with the German car marques: BMW, Mercedes Benz, and VAG. C3 oil can have a 5W-30, 5W-40 or 0W-30 viscosity. In this example, clever oil technology has allowed the inclusion of the C2 performance level.
Which is better C2 or C3 oil?
Example – an ACEA C2 engine oil will provide better fuel economy that an ACEA C3 engine oil, but may not provide the same protection levels due to the lower film strength. ACEA C grade oils are for the most, not interchangeable with one another depending on the particular applications.