[1] Ordinarily the question as to whether or not a vehicle was used with the permission of the owner is one of fact, to be determined by the trial court. ( Mize v. Jorden, 116 Cal.App.2d 301 [ 253 P.2d 702]; Casey v. Fortune, 78 Cal.App.2d 922 [ 179 P.2d 99].) [2] The trial court is the sole judge of the credibility of the witnesses, and if there is any substantial support for a finding such finding will not be disturbed on appeal. ( Flemmer v. Monckton, 73 Cal.App.2d 271 [ 166 P.2d 380].)