Cat® High Efficiency Filters outperformed four other filter brands in recent testing. We pitted the Cat 1R-0749 Advanced High Efficiency Fuel Filter against four equivalent competitors to compare fuel injector life. Highly contaminated fuel was circulated through a C9 engine fuel system test rig at rated and high idle to simulate an extremely harsh operating environment. Only the Cat Filter reached the end of the test before fuel injector failure. Injectors with other filters experienced a leakage rate three times that of new, significant erosion and leak paths, and high levels of contamination. What does that mean for you? Using Cat Fuel Filters over the entire lifecycle of your truck engine can increase fuel injector life by 45 percent, help you maintain optimum fuel economy and decrease your cost per hour by 80 percent or more.