Fuel - Efficent synthetic A.T.F. in place of the DW-1 , . States DW-1 replacement at AMSOIL site , https://www.amsoil.com/p/signature-series-fuel-efficient-synthetic-automatic-transmission-fluid-atl/ . Under COMMENTS he states the 5 speed auto shifts smoother with the Signature Series synthetic . Also states has used it for awhile .
Last edited: