diff --git a/frogpilot/common/frogpilot_variables.py b/frogpilot/common/frogpilot_variables.py
index 1b4568fd..eea85a5a 100644
--- a/frogpilot/common/frogpilot_variables.py
+++ b/frogpilot/common/frogpilot_variables.py
@@ -502,8 +502,9 @@ class FrogPilotVariables:
       ev_tuning_param = False
       self.params.put_bool("EVTuning", False)
 
-    toggle.ev_tuning = ev_tuning_param if advanced_longitudinal_tuning else ev_vehicle
-    toggle.truck_tuning = truck_tuning_param if advanced_longitudinal_tuning else False
+    # Seed powertrain-based defaults once, but always honor persisted user overrides.
+    toggle.ev_tuning = ev_tuning_param
+    toggle.truck_tuning = truck_tuning_param
     toggle.longitudinalActuatorDelay = self.get_value("LongitudinalActuatorDelay", cast=float, condition=advanced_longitudinal_tuning, default=longitudinalActuatorDelay, min=0, max=1)
     toggle.max_desired_acceleration = self.get_value("MaxDesiredAcceleration", cast=float, condition=advanced_longitudinal_tuning, default=MAX_ACCELERATION, min=0.1, max=MAX_ACCELERATION)
     toggle.startAccel = self.get_value("StartAccel", cast=float, condition=advanced_longitudinal_tuning, default=startAccel, min=0, max=MAX_ACCELERATION)