Waxes in mineral oils and fuels will fall out at lower temperatures. This will hinder lubricant and fuel performance as wax can clog filters and reduce/eliminate flow.

PPDs act as wax crystal modifiers that alter the size of the crystal. They do this by absorbing on the surface of newly formed crystals or by co-crystallizing with the precipitating wax.  Both mechanisms inhibit crystal growth and keep the oil fluid.

Wuxi South Petroleum Additives has several high quality PPD products and can assist with determining which one is right for your formulation.