diff --git a/Controllers/VehicleController.cs b/Controllers/VehicleController.cs
index dd7c5b5..1f1a6f0 100644
--- a/Controllers/VehicleController.cs
+++ b/Controllers/VehicleController.cs
@@ -538,10 +538,13 @@ namespace CarCareTracker.Controllers
             {
                 computedResults = computedResults.OrderByDescending(x => DateTime.Parse(x.Date)).ThenByDescending(x => x.Mileage).ToList();
             }
-            var vehicleIsElectric = _dataAccess.GetVehicleById(vehicleId).IsElectric;
+            var vehicleData = _dataAccess.GetVehicleById(vehicleId);
+            var vehicleIsElectric = vehicleData.IsElectric;
+            var vehicleUseHours = vehicleData.UseHours;
             var viewModel = new GasRecordViewModelContainer()
             {
                 UseKwh = vehicleIsElectric,
+                UseHours = vehicleUseHours,
                 GasRecords = computedResults
             };
             return PartialView("_Gas", viewModel);
@@ -564,9 +567,12 @@ namespace CarCareTracker.Controllers
             return Json(result);
         }
         [HttpGet]
-        public IActionResult GetAddGasRecordPartialView()
+        public IActionResult GetAddGasRecordPartialView(int vehicleId)
         {
-            return PartialView("_GasModal", new GasRecordInputContainer() { GasRecord = new GasRecordInput() });
+            var vehicleData = _dataAccess.GetVehicleById(vehicleId);
+            var vehicleIsElectric = vehicleData.IsElectric;
+            var vehicleUseHours = vehicleData.UseHours;
+            return PartialView("_GasModal", new GasRecordInputContainer() { UseKwh = vehicleIsElectric, UseHours = vehicleUseHours, GasRecord = new GasRecordInput() });
         }
         [HttpGet]
         public IActionResult GetGasRecordForEditById(int gasRecordId)
@@ -585,10 +591,13 @@ namespace CarCareTracker.Controllers
                 MissedFuelUp = result.MissedFuelUp,
                 Notes = result.Notes
             };
-            var vehicleIsElectric = _dataAccess.GetVehicleById(convertedResult.VehicleId).IsElectric;
+            var vehicleData = _dataAccess.GetVehicleById(convertedResult.VehicleId);
+            var vehicleIsElectric = vehicleData.IsElectric;
+            var vehicleUseHours = vehicleData.UseHours;
             var viewModel = new GasRecordInputContainer()
             {
                 UseKwh = vehicleIsElectric,
+                UseHours = vehicleUseHours,
                 GasRecord = convertedResult
             };
             return PartialView("_GasModal", viewModel);
diff --git a/Models/GasRecord/GasRecordInputContainer.cs b/Models/GasRecord/GasRecordInputContainer.cs
index 5d9c88d..0cb4110 100644
--- a/Models/GasRecord/GasRecordInputContainer.cs
+++ b/Models/GasRecord/GasRecordInputContainer.cs
@@ -2,7 +2,8 @@
 {
     public class GasRecordInputContainer
     {
-       public bool UseKwh { get; set; }
-       public GasRecordInput GasRecord { get; set; }
+        public bool UseKwh { get; set; }
+        public bool UseHours { get; set; }
+        public GasRecordInput GasRecord { get; set; }
     }
 }
diff --git a/Models/GasRecord/GasRecordViewModelContainer.cs b/Models/GasRecord/GasRecordViewModelContainer.cs
index 3efd468..e6a1de2 100644
--- a/Models/GasRecord/GasRecordViewModelContainer.cs
+++ b/Models/GasRecord/GasRecordViewModelContainer.cs
@@ -2,7 +2,8 @@
 {
     public class GasRecordViewModelContainer
     {
-       public bool UseKwh { get; set; }
-       public List<GasRecordViewModel> GasRecords { get; set; } = new List<GasRecordViewModel>();
+        public bool UseKwh { get; set; }
+        public bool UseHours { get; set; }
+        public List<GasRecordViewModel> GasRecords { get; set; } = new List<GasRecordViewModel>();
     }
 }
diff --git a/Models/Vehicle.cs b/Models/Vehicle.cs
index cd01f98..5ae3bc8 100644
--- a/Models/Vehicle.cs
+++ b/Models/Vehicle.cs
@@ -9,5 +9,6 @@
         public string Model { get; set; }
         public string LicensePlate { get; set; }
         public bool IsElectric { get; set; } = false;
+        public bool UseHours { get; set; } = false;
     }
 }
diff --git a/Views/Vehicle/_Gas.cshtml b/Views/Vehicle/_Gas.cshtml
index e6e9b0b..e861d27 100644
--- a/Views/Vehicle/_Gas.cshtml
+++ b/Views/Vehicle/_Gas.cshtml
@@ -11,28 +11,29 @@
     var useThreeDecimals = userConfig.UseThreeDecimalGasCost;
     var gasCostFormat = useThreeDecimals ? "C3" : "C2";
     var useKwh = Model.UseKwh;
+    var useHours = Model.UseHours;
     string consumptionUnit;
     string fuelEconomyUnit;
-    string distanceUnit = useMPG ? "mi." : "km";
+    string distanceUnit = useHours ? "h" : (useMPG ? "mi." : "km");
     if (useKwh)
     {
         consumptionUnit = "kWh";
-        fuelEconomyUnit = useMPG ? "mi./kWh" : "kWh/100km";
+        fuelEconomyUnit = useMPG ? $"{distanceUnit}/kWh" : $"kWh/100{distanceUnit}";
     }
     else if (useMPG && useUKMPG)
     {
         consumptionUnit = "imp gal";
-        fuelEconomyUnit = "mpg";
+        fuelEconomyUnit = useHours ? "h/g" : "mpg";
     } else if (useUKMPG)
     {
-        fuelEconomyUnit = "l/100mi.";
+        fuelEconomyUnit = useHours ? "l/100h" : "l/100mi.";
         consumptionUnit = "l";
-        distanceUnit = "mi.";
+        distanceUnit = useHours ? "h" : "mi.";
     }
     else
     {
         consumptionUnit = useMPG ? "US gal" : "l";
-        fuelEconomyUnit = useMPG ? "mpg" : "l/100km";
+        fuelEconomyUnit = useHours ? (useMPG ? "h/g" : "l/100h") : (useMPG ? "mpg" : "l/100km");
     }
 }
 <div class="row">
diff --git a/Views/Vehicle/_GasModal.cshtml b/Views/Vehicle/_GasModal.cshtml
index caa2e41..8986375 100644
--- a/Views/Vehicle/_GasModal.cshtml
+++ b/Views/Vehicle/_GasModal.cshtml
@@ -5,6 +5,7 @@
     var useMPG = config.GetUserConfig(User).UseMPG;
     var useUKMPG = config.GetUserConfig(User).UseUKMPG;
     var useKwh = Model.UseKwh;
+    var useHours = Model.UseHours;
     var isNew = Model.GasRecord.Id == 0;
     string consumptionUnit;
     string distanceUnit;
@@ -19,7 +20,11 @@
     {
         consumptionUnit = useMPG ? "gallons" : "liters";
     }
-    if (useUKMPG)
+    if (useHours)
+    {
+        distanceUnit = "hours";
+    }
+    else if (useUKMPG)
     {
         distanceUnit = "miles";
     }
diff --git a/Views/Vehicle/_VehicleHistory.cshtml b/Views/Vehicle/_VehicleHistory.cshtml
index 575efac..2187cf1 100644
--- a/Views/Vehicle/_VehicleHistory.cshtml
+++ b/Views/Vehicle/_VehicleHistory.cshtml
@@ -5,22 +5,24 @@
     var useMPG = config.GetUserConfig(User).UseMPG;
     var useUKMPG = config.GetUserConfig(User).UseUKMPG;
     var useKwh = Model.VehicleData.IsElectric;
+    var useHours = Model.VehicleData.UseHours;
     string fuelEconomyUnit;
     if (useKwh)
     {
-        fuelEconomyUnit = useMPG ? "mi./kWh" : "kWh/100km";
+        var distanceUnit = useHours ? "h" : (useMPG ? "mi." : "km");
+        fuelEconomyUnit = useMPG ? $"{distanceUnit}/kWh" : $"kWh/100{distanceUnit}";
     }
     else if (useMPG && useUKMPG)
     {
-        fuelEconomyUnit = "mpg";
+        fuelEconomyUnit = useHours ? "h/g" : "mpg";
     }
     else if (useUKMPG)
     {
-        fuelEconomyUnit = "l/100mi.";
+        fuelEconomyUnit = useHours ? "l/100h" : "l/100mi.";
     }
     else
     {
-        fuelEconomyUnit = useMPG ? "mpg" : "l/100km";
+        fuelEconomyUnit = useHours ? (useMPG ? "h/g" : "l/100h") : (useMPG ? "mpg" : "l/100km");
     }
 }
 @model VehicleHistoryViewModel
diff --git a/Views/Vehicle/_VehicleModal.cshtml b/Views/Vehicle/_VehicleModal.cshtml
index f9d209c..9cd8bb7 100644
--- a/Views/Vehicle/_VehicleModal.cshtml
+++ b/Views/Vehicle/_VehicleModal.cshtml
@@ -33,6 +33,10 @@
                 <input class="form-check-input" type="checkbox" role="switch" id="inputIsElectric" checked="@Model.IsElectric">
                 <label class="form-check-label" for="inputIsElectric">Electric Vehicle</label>
             </div>
+            <div class="form-check form-switch">
+                <input class="form-check-input" type="checkbox" role="switch" id="inputUseHours" checked="@Model.UseHours">
+                <label class="form-check-label" for="inputUseHours">Use Engine Hours</label>
+            </div>
             @if (!string.IsNullOrWhiteSpace(Model.ImageLocation))
             {
                 <label for="inputImage">Replace picture(optional)</label>
diff --git a/wwwroot/js/gasrecord.js b/wwwroot/js/gasrecord.js
index df7359e..d984aad 100644
--- a/wwwroot/js/gasrecord.js
+++ b/wwwroot/js/gasrecord.js
@@ -1,5 +1,5 @@
 function showAddGasRecordModal() {
-    $.get('/Vehicle/GetAddGasRecordPartialView', function (data) {
+    $.get(`/Vehicle/GetAddGasRecordPartialView?vehicleId=${GetVehicleId().vehicleId}`, function (data) {
         if (data) {
             $("#gasRecordModalContent").html(data);
             //initiate datepicker
diff --git a/wwwroot/js/shared.js b/wwwroot/js/shared.js
index 9dcb791..b95ca16 100644
--- a/wwwroot/js/shared.js
+++ b/wwwroot/js/shared.js
@@ -38,6 +38,7 @@ function saveVehicle(isEdit) {
     var vehicleModel = $("#inputModel").val();
     var vehicleLicensePlate = $("#inputLicensePlate").val();
     var vehicleIsElectric = $("#inputIsElectric").is(":checked");
+    var vehicleUseHours = $("#inputUseHours").is(":checked");
     //validate
     var hasError = false;
     if (vehicleYear.trim() == '' || parseInt(vehicleYear) < 1900) {
@@ -74,7 +75,8 @@ function saveVehicle(isEdit) {
         make: vehicleMake,
         model: vehicleModel,
         licensePlate: vehicleLicensePlate,
-        isElectric: vehicleIsElectric
+        isElectric: vehicleIsElectric,
+        useHours: vehicleUseHours
     }, function (data) {
         if (data) {
             if (!isEdit) {