Caterpillar 1R0734 1R-0734 Engine Oil Filter Advanced High Efficiency Multipack (Pack of 2) Advanced Efficiency Filters have increased contamination control without giving up capacity. They meet stricter emission requirements and are available as an upgrade for some Standard Efficiency Filters when better filtration is favorable. Cat Engine Oil Filters are designed to meet the needs of Cat engines by providing superior protection against particles that can make their way into the lubrication system during service or component wear. Efficiency Rating: Advanced Efficiency