It's not quite that simple, generally the wider the range the more vii (viscosity index improvers) yes, but HPL for example has a "no vii" line up which has as the name suggests absolutely no vii's whatsoever and that comes in a 5w-30 if you wish. Also Ester and PAO base oils need less of this just due to their makeup.
That is not true and it is just that simple.
0w oil is zero weight oil. 10w oil is ten weight oil.
There are two manufacturers under HPL:
1)
Why HPL | United States | HPL Superior Lubricants
2)
Premium Plus Passenger Car Engine Oil | High Performance Lubricants
Both of them contain viscosity improvers.
1)
What is oil viscosity? Edit, this link doesn't get you there. Go to
HPL Oil - Superior Lubricants Made in the USA, located in Hebron, IN select the NEWS drop down, go to the bottom of the page and select FAQ, then select What is oil viscosity.
The viscosity index (VI) is a standard method of measuring a fluid's viscosity change in relation to temperature. The higher the VI, the smaller the relative change in viscosity vs. temperature.
SAE viscosity is the measurement of oil flow at set temperatures. Oil flow is measured at -22°F and 212°F in order to determine a flow range. Using SAE 5W30 oil for example, the first number (5) is measured at -22°F (cold) while the second number (30) is measured at 212°F (hot). By using viscosity improver’s oil can be engineered to get thicker (higher VI) as oil temperature increases.
VI improvers (or viscosity modifiers) are polymeric molecules that are sensitive to temperature, they actually expand as temperature increases, this minimizes how much the oil thins with heat. At low temperatures, these molecule chain contracts and do not affect the oil viscosity. This is what allows oil to be thinner when cold and become thicker as it heats up.
2)
High Performance Lubricants’ Premium Plus passenger car engine oil is a multi-synthetic high performance motor oil made with the best choices of additive chemistry. When compared with our other PCMO product lines this series takes advantage of high quality PAO delivering superb pour points as well as an advanced VI Improver that has superior shear stability index. It is designed for equipment, environment, or service that is particularly harsh. Oils formulated with specifically chosen esters can help to minimize intake valve deposits, maintain clean engines and provide elastomer compatibility. The correct detergent selection combined with base stocks that have low volatility will combat low speed pre-ignition (LPSI) making it a perfect oil for gasoline direct injected (GDI) engines and small displacement turbocharged gasoline engines. HPL PCMO Premium Plus is also formulated with extra anti-wear and antioxidant additives to minimize wear while offering an extended oil life compared to other motor oils. Additionally, HPL PCMO Premium Plus contains premium viscosity index improvers (VII) to minimize shear, further extending the life of the oil. This technology has been proven on the race tracks around the nation. Our Bad *** Racing oils have common additive strategy when compared to this PCMO Premium Plus formulation and have been extremely successful winning multiple championships in many forms of professional motor-sports. These oils are not something you will find on the shelf of a discount retailer. If you are a person looking for a product that will outperform traditional mineral and synthetic oils our products will be a perfect fit for you.
BTW, these viscosity improvers and other additives are proprietary and may be incompatible between brands, which is why the mixing of different brands of motor oil is not recommended.
