The down-speeding of the powertrain involves the use of transmissions with an increased number of gear ratios with smaller steps between each ratio.Īutomatic transmissions with 8 to 10 forward gear ratios are now common, while 4 to 6 speed automatic transmissions were most common in the recent past. By optimizing torque to lower operating speeds, greater fuel economy is possible. The extensive fuel, ignition and boost adjustability and control that TGDI engines have allows them to be tuned with maximum torque achieved at very low engine speeds (by 2,000 rpm is typical). The TGDI engines provide the torque and power output of larger displacement, non-turbo engines while returning fuel economy approaching that of smaller displacement, non-turbo engines.įor example, late model TGDI 2.0 Liter engines commonly produce power levels equaling 3.0L to 3.5L V-6 engines from 5 to 10 years ago. The down-sizing is accomplished with the use of Turbocharged Gasoline Direct Injection (TGDI) engines. In the continuing effort to increase passenger car and light truck fuel economy, automakers have employed a “down-sizing” and “downspeeding” strategy to current vehicle powertrains. HPS is the most robust engine oil Royal Purple makes for non-racing applications. HPS is also the choice for those seeking to maximize horsepower and torque, while reducing wear, heat and fuel consumption. This motor oil line offers the incredible performance and protection provided by Royal Purple’s proprietary Synerlec technology as well as a dramatically enhanced anti-wear package. HPS is formulated with consumers in mind.

As such, API/ILSAC compliant oils aren’t the best solution for consumers that have modified their vehicles or those simply looking for the greatest performance. Over the last several years, these specifications have become increasingly restrictive on certain additives, particularly those commonly used for anti-wear. Royal Purple API-licensed motor oil is formulated specifically to meet current American Petroleum Institute (API), International Lubricant Standardization and Approval Committee (ILSAC), and Association des Constructeurs Européens d’Automobiles (ACEA) specifications for new vehicle warranties.

Royal purple oil