To help break up and resuspend the solids, it helps to have heat as well as a diluent. A typical temperature might be 140°F (60 °C), but depends on the flash point of the diluent. The diluent might be the product itself, or could be a compatible cutter stock such as diesel, VGO, LCO, etc. Often, a lab blend determines an effective level, but cutter-to-sludge ratios of 1:1 to 4:1 are common.