plasticizer would be added later alternatively in the embodiment mentioned above for diluting the monomer to get the plasticization effect part of the water would be replaced prior to latex polymerization with the a winterizing additive including but not necessarily limited to ethylene glycol propylene glycol and mixtures thereof the latex dra polymers described herein are especially effective in reducing drag in heavy crude oil which has high asphaltene content u201c high asphaltene content u201d is defined here as at least about 3 wt in one non restrictive version at least about 5 wt alternatively at least 10 wt even over 20 wt alternative definitions of u201c high asphaltene content u201d include an api gravity of 26 u00b0 or less in another non limiting embodiment an api gravity of 22 u00b0 or lower asphaltenic heavy crude oil is typically diluted with gasoline or naphtha by about 30 wt to reduce the viscosity enough to be able to pump the heavy crude oil the diluent is recycled and adds considerable expense to the task of pumping high asphaltenic crude oils suitable diluents include but are not necessarily limited to gasoline natural gasoline naphtha condensate and combinations thereof more specifically the naphtha usually comes from an oilfield heavy crude oil.