<div class="htmlview paragraph">A cold flow index of automotive diesel fuels in Japan has been investigated, from the view point of the fuel system configuration of diesel vehicles, by a task force study organized by the Japan Petroleum Institute. The results of the study are as follows; <ol class="list nostyle"> <li class="list-item"><span class="li-label">1.</span> <div class="htmlview paragraph">The Cold Filter Plugging Point (IP 309, JIS K 2288) was found to be an excellent index of cold flow properties of automotive diesel fuels for the operability of Japanese diesel vehicles.</div></li> <li class="list-item"><span class="li-label">2.</span> <div class="htmlview paragraph">CFPP values for cold operability limits for the fuels at minimum ambient temperatures were established in the range from −5° to −30°C.</div></li> <li class="list-item"><span class="li-label">3.</span> <div class="htmlview paragraph">A rig tester simulating the cold operation of the most sensitive vehicle at ambient temperature was very effective in evaluating the cold flow properties of automotive diesel fuels.</div></li> </ol></div>