diff --git a/Controllers/VehicleController.cs b/Controllers/VehicleController.cs
index 65f7f03..ecd9fec 100644
--- a/Controllers/VehicleController.cs
+++ b/Controllers/VehicleController.cs
@@ -154,6 +154,7 @@ public IActionResult DeleteVehicle(int vehicleId)
                 _planRecordDataAccess.DeleteAllPlanRecordsByVehicleId(vehicleId) &&
                 _planRecordTemplateDataAccess.DeleteAllPlanRecordTemplatesByVehicleId(vehicleId) &&
                 _supplyRecordDataAccess.DeleteAllSupplyRecordsByVehicleId(vehicleId) &&
+                _odometerRecordDataAccess.DeleteAllOdometerRecordsByVehicleId(vehicleId) &&
                 _userLogic.DeleteAllAccessToVehicle(vehicleId) &&
                 _dataAccess.DeleteVehicle(vehicleId);
             return Json(result);
diff --git a/Helper/StaticHelper.cs b/Helper/StaticHelper.cs
index 56155be..2e4c63e 100644
--- a/Helper/StaticHelper.cs
+++ b/Helper/StaticHelper.cs
@@ -8,7 +8,7 @@ namespace CarCareTracker.Helper
     /// </summary>
     public static class StaticHelper
     {
-        public static string VersionNumber = "1.2.6";
+        public static string VersionNumber = "1.2.7";
         public static string DbName = "data/cartracker.db";
         public static string UserConfigPath = "config/userConfig.json";
         public static string GenericErrorMessage = "An error occurred, please try again later";
diff --git a/Models/Vehicle.cs b/Models/Vehicle.cs
index 4ae53ec..79e23d2 100644
--- a/Models/Vehicle.cs
+++ b/Models/Vehicle.cs
@@ -14,5 +14,14 @@ public class Vehicle
         public bool UseHours { get; set; } = false;
         public List<ExtraField> ExtraFields { get; set; } = new List<ExtraField>();
         public List<string> Tags { get; set; } = new List<string>();
+        public bool HasOdometerAdjustment { get; set; } = false;
+        /// <summary>
+        /// Primarily used for vehicles with odometer units different from user's settings.
+        /// </summary>
+        public string OdometerMultiplier { get; set; } = "1";
+        /// <summary>
+        /// Primarily used for vehicles where the odometer does not reflect actual mileage.
+        /// </summary>
+        public string OdometerDifference { get; set; } = "0";
     }
 }
diff --git a/Views/Home/Index.cshtml b/Views/Home/Index.cshtml
index 33ef21e..5205d15 100644
--- a/Views/Home/Index.cshtml
+++ b/Views/Home/Index.cshtml
@@ -119,7 +119,7 @@
 </div>
 
 <div class="modal fade" id="addVehicleModal" tabindex="-1" role="dialog">
-    <div class="modal-dialog" role="document">
+    <div class="modal-dialog modal-lg" role="document">
         <div class="modal-content" id="addVehicleModalContent">
         </div>
     </div>
diff --git a/Views/Vehicle/Index.cshtml b/Views/Vehicle/Index.cshtml
index 2650f4a..f9c4941 100644
--- a/Views/Vehicle/Index.cshtml
+++ b/Views/Vehicle/Index.cshtml
@@ -139,7 +139,7 @@
     </div>
 </div>
 <div class="modal fade" id="editVehicleModal" tabindex="-1" role="dialog">
-    <div class="modal-dialog" role="document">
+    <div class="modal-dialog modal-lg" role="document">
         <div class="modal-content" id="editVehicleModalContent">
         </div>
     </div>
@@ -169,7 +169,12 @@
 </div>
 <script>
     function GetVehicleId() {
-        return { vehicleId: @Model.Id};
+        return { 
+            vehicleId: @Model.Id, 
+            hasOdometerAdjustment: @Model.HasOdometerAdjustment.ToString().ToLower(),
+            odometerDifference: decodeHTMLEntities('@Model.OdometerDifference'),
+            odometerMultiplier: decodeHTMLEntities('@Model.OdometerMultiplier')
+        };
     }
     function GetDefaultTab() {
         return { tab: "@userConfig.DefaultTab" };
diff --git a/Views/Vehicle/_VehicleModal.cshtml b/Views/Vehicle/_VehicleModal.cshtml
index 2191641..c4e930c 100644
--- a/Views/Vehicle/_VehicleModal.cshtml
+++ b/Views/Vehicle/_VehicleModal.cshtml
@@ -26,50 +26,69 @@
 <div class="modal-body">
     <form class="form-inline">
         <div class="form-group">
-            <label for="inputYear">@translator.Translate(userLanguage, "Year")</label>
-            <input type="number" inputmode="numeric" id="inputYear" class="form-control" placeholder="@translator.Translate(userLanguage, "Year(must be after 1900)")" value="@(isNew ? "" : Model.Year)">
-            <label for="inputMake">@translator.Translate(userLanguage, "Make")</label>
-            <input type="text" id="inputMake" class="form-control" placeholder="@translator.Translate(userLanguage, "Make")" value="@Model.Make">
-            <label for="inputModel">@translator.Translate(userLanguage, "Model")</label>
-            <input type="text" id="inputModel" class="form-control" placeholder="@translator.Translate(userLanguage, "Model")" value="@Model.Model">
-            <label for="inputLicensePlate">@translator.Translate(userLanguage, "License Plate")</label>
-            <input type="text" id="inputLicensePlate" class="form-control" placeholder="@translator.Translate(userLanguage, "License Plate")" value="@Model.LicensePlate">
-            <label for="inputPurchaseDate">@translator.Translate(userLanguage, "Purchased Date(optional)")</label>
-            <input type="text" id="inputPurchaseDate" class="form-control" placeholder="@translator.Translate(userLanguage, "Purchased Date")" value="@Model.PurchaseDate">
-            <label for="inputSoldDate">@translator.Translate(userLanguage, "Sold Date(optional)")</label>
-            <input type="text" id="inputSoldDate" class="form-control" placeholder="@translator.Translate(userLanguage, "Sold Date")" value="@Model.SoldDate">
-            <div class="form-check form-switch">
-                <input class="form-check-input" type="checkbox" role="switch" id="inputIsElectric" checked="@Model.IsElectric">
-                <label class="form-check-label" for="inputIsElectric">@translator.Translate(userLanguage, "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">@translator.Translate(userLanguage, "Use Engine Hours")</label>
-            </div>
-            <label for="inputTag">@translator.Translate(userLanguage, "Tags(optional)")</label>
-            <select multiple class="form-select" id="inputTag">
-                @foreach (string tag in Model.Tags)
-                {
-                    <!option value="@tag">@tag</!option>
-                }
-            </select>
-            @foreach (ExtraField field in Model.ExtraFields)
-            {
-                var elementId = Guid.NewGuid();
-                <div class="extra-field">
-                    <label for="@elementId">@field.Name</label>
-                    <input type="text" id="@elementId" class="form-control @(field.IsRequired ? "extra-field-required" : "")" placeholder="@field.Name" value="@field.Value">
+            <div class="row">
+                <div class="col-12 col-md-6">
+                    <label for="inputYear">@translator.Translate(userLanguage, "Year")</label>
+                    <input type="number" inputmode="numeric" id="inputYear" class="form-control" placeholder="@translator.Translate(userLanguage, "Year(must be after 1900)")" value="@(isNew ? "" : Model.Year)">
+                    <label for="inputMake">@translator.Translate(userLanguage, "Make")</label>
+                    <input type="text" id="inputMake" class="form-control" placeholder="@translator.Translate(userLanguage, "Make")" value="@Model.Make">
+                    <label for="inputModel">@translator.Translate(userLanguage, "Model")</label>
+                    <input type="text" id="inputModel" class="form-control" placeholder="@translator.Translate(userLanguage, "Model")" value="@Model.Model">
+                    <label for="inputLicensePlate">@translator.Translate(userLanguage, "License Plate")</label>
+                    <input type="text" id="inputLicensePlate" class="form-control" placeholder="@translator.Translate(userLanguage, "License Plate")" value="@Model.LicensePlate">
+                    @foreach (ExtraField field in Model.ExtraFields)
+                    {
+                        var elementId = Guid.NewGuid();
+                        <div class="extra-field">
+                            <label for="@elementId">@field.Name</label>
+                            <input type="text" id="@elementId" class="form-control @(field.IsRequired ? "extra-field-required" : "")" placeholder="@field.Name" value="@field.Value">
+                        </div>
+                    }
                 </div>
-            }
-            @if (!string.IsNullOrWhiteSpace(Model.ImageLocation))
-            {
-                <label for="inputImage">@translator.Translate(userLanguage, "Replace picture(optional)")</label>
-                <input onChange="uploadFileAsync(this)" type="file" accept=".png,.jpg,.jpeg" class="form-control-file" id="inputImage">
-            } else
-            {
-                <label for="inputImage">@translator.Translate(userLanguage, "Upload a picture(optional)")</label>
-                <input onChange="uploadFileAsync(this)" type="file" accept=".png,.jpg,.jpeg" class="form-control-file" id="inputImage">
-            }
+                <div class="col-12 col-md-6">
+                    <label for="inputPurchaseDate">@translator.Translate(userLanguage, "Purchased Date(optional)")</label>
+                    <input type="text" id="inputPurchaseDate" class="form-control" placeholder="@translator.Translate(userLanguage, "Purchased Date")" value="@Model.PurchaseDate">
+                    <label for="inputSoldDate">@translator.Translate(userLanguage, "Sold Date(optional)")</label>
+                    <input type="text" id="inputSoldDate" class="form-control" placeholder="@translator.Translate(userLanguage, "Sold Date")" value="@Model.SoldDate">
+                    <div class="form-check form-switch">
+                        <input class="form-check-input" type="checkbox" role="switch" id="inputIsElectric" checked="@Model.IsElectric">
+                        <label class="form-check-label" for="inputIsElectric">@translator.Translate(userLanguage, "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">@translator.Translate(userLanguage, "Use Engine Hours")</label>
+                    </div>
+                    <div class="form-check form-switch">
+                        <input class="form-check-input" type="checkbox" role="switch" onchange="toggleOdometerAdjustment()" id="inputHasOdometerAdjustment" checked="@Model.HasOdometerAdjustment">
+                        <label class="form-check-label" for="inputHasOdometerAdjustment">@translator.Translate(userLanguage, "Odometer Adjustments")</label>
+                    </div>
+                    <div class="collapse @(Model.HasOdometerAdjustment ? "show" : "")" id="odometerAdjustments">
+                        <div>
+                            <label for="inputOdometerMultiplier">@translator.Translate(userLanguage, "Odometer Multiplier")</label>
+                            <input type="text" id="inputOdometerMultiplier" class="form-control" placeholder="@translator.Translate(userLanguage, "Odometer Multiplier")" value="@Model.OdometerMultiplier">
+                            <label for="inputOdometerDifference">@translator.Translate(userLanguage, "Odometer Difference")</label>
+                            <input type="text" id="inputOdometerDifference" class="form-control" placeholder="@translator.Translate(userLanguage, "Odometer Difference")" value="@Model.OdometerDifference">
+                        </div>
+                    </div>
+                    <label for="inputTag">@translator.Translate(userLanguage, "Tags(optional)")</label>
+                    <select multiple class="form-select" id="inputTag">
+                        @foreach (string tag in Model.Tags)
+                        {
+                            <!option value="@tag">@tag</!option>
+                        }
+                    </select>
+                    @if (!string.IsNullOrWhiteSpace(Model.ImageLocation))
+                    {
+                        <label for="inputImage">@translator.Translate(userLanguage, "Replace picture(optional)")</label>
+                        <input onChange="uploadFileAsync(this)" type="file" accept=".png,.jpg,.jpeg" class="form-control-file" id="inputImage">
+                    }
+                    else
+                    {
+                        <label for="inputImage">@translator.Translate(userLanguage, "Upload a picture(optional)")</label>
+                        <input onChange="uploadFileAsync(this)" type="file" accept=".png,.jpg,.jpeg" class="form-control-file" id="inputImage">
+                    }
+                </div>
+            </div>
         </div>
     </form>
 </div>
diff --git a/wwwroot/js/collisionrecord.js b/wwwroot/js/collisionrecord.js
index e44ac18..d002981 100644
--- a/wwwroot/js/collisionrecord.js
+++ b/wwwroot/js/collisionrecord.js
@@ -86,6 +86,8 @@ function getAndValidateCollisionRecordValues() {
     var vehicleId = GetVehicleId().vehicleId;
     var collisionRecordId = getCollisionRecordModelData().id;
     var addReminderRecord = $("#addReminderCheck").is(":checked");
+    //Odometer Adjustments
+    collisionMileage = GetAdjustedOdometer(collisionRecordId, collisionMileage);
     //validation
     var hasError = false;
     var extraFields = getAndValidateExtraFields();
diff --git a/wwwroot/js/gasrecord.js b/wwwroot/js/gasrecord.js
index 6749cc5..e6525bd 100644
--- a/wwwroot/js/gasrecord.js
+++ b/wwwroot/js/gasrecord.js
@@ -85,6 +85,8 @@ function getAndValidateGasRecordValues() {
     var gasTags = $("#gasRecordTag").val();
     var vehicleId = GetVehicleId().vehicleId;
     var gasRecordId = getGasRecordModelData().id;
+    //Odometer Adjustments
+    gasMileage = GetAdjustedOdometer(gasRecordId, gasMileage);
     //validation
     var hasError = false;
     var extraFields = getAndValidateExtraFields();
diff --git a/wwwroot/js/odometerrecord.js b/wwwroot/js/odometerrecord.js
index de2afc6..7a2d363 100644
--- a/wwwroot/js/odometerrecord.js
+++ b/wwwroot/js/odometerrecord.js
@@ -84,6 +84,8 @@ function getAndValidateOdometerRecordValues() {
     var serviceTags = $("#odometerRecordTag").val();
     var vehicleId = GetVehicleId().vehicleId;
     var odometerRecordId = getOdometerRecordModelData().id;
+    //Odometer Adjustments
+    serviceMileage = GetAdjustedOdometer(odometerRecordId, serviceMileage);
     //validation
     var hasError = false;
     var extraFields = getAndValidateExtraFields();
diff --git a/wwwroot/js/planrecord.js b/wwwroot/js/planrecord.js
index 838ab75..6ce5248 100644
--- a/wwwroot/js/planrecord.js
+++ b/wwwroot/js/planrecord.js
@@ -241,7 +241,9 @@ function updatePlanRecordProgress(newProgress) {
                 },
             }).then(function (result) {
                 if (result.isConfirmed) {
-                    $.post('/Vehicle/UpdatePlanRecordProgress', { planRecordId: draggedId, planProgress: newProgress, odometer: result.value.odometer }, function (data) {
+                    //Odometer Adjustments
+                    var adjustedOdometer = GetAdjustedOdometer(0, result.value.odometer);
+                    $.post('/Vehicle/UpdatePlanRecordProgress', { planRecordId: draggedId, planProgress: newProgress, odometer: adjustedOdometer }, function (data) {
                         if (data) {
                             successToast("Plan Progress Updated");
                             var vehicleId = GetVehicleId().vehicleId;
diff --git a/wwwroot/js/servicerecord.js b/wwwroot/js/servicerecord.js
index f634722..1055772 100644
--- a/wwwroot/js/servicerecord.js
+++ b/wwwroot/js/servicerecord.js
@@ -86,6 +86,8 @@ function getAndValidateServiceRecordValues() {
     var vehicleId = GetVehicleId().vehicleId;
     var serviceRecordId = getServiceRecordModelData().id;
     var addReminderRecord = $("#addReminderCheck").is(":checked");
+    //Odometer Adjustments
+    serviceMileage = GetAdjustedOdometer(serviceRecordId, serviceMileage);
     //validation
     var hasError = false;
     var extraFields = getAndValidateExtraFields();
diff --git a/wwwroot/js/shared.js b/wwwroot/js/shared.js
index 5dbca87..d2302f6 100644
--- a/wwwroot/js/shared.js
+++ b/wwwroot/js/shared.js
@@ -42,6 +42,9 @@ function saveVehicle(isEdit) {
     var vehicleLicensePlate = $("#inputLicensePlate").val();
     var vehicleIsElectric = $("#inputIsElectric").is(":checked");
     var vehicleUseHours = $("#inputUseHours").is(":checked");
+    var vehicleHasOdometerAdjustment = $("#inputHasOdometerAdjustment").is(':checked');
+    var vehicleOdometerMultiplier = $("#inputOdometerMultiplier").val();
+    var vehicleOdometerDifference = parseInt(globalParseFloat($("#inputOdometerDifference").val())).toString();
     var extraFields = getAndValidateExtraFields(true);
     //validate
     var hasError = false;
@@ -72,6 +75,23 @@ function saveVehicle(isEdit) {
     } else {
         $("#inputLicensePlate").removeClass("is-invalid");
     }
+    if (vehicleHasOdometerAdjustment) {
+        //validate odometer adjustments
+        //validate multiplier
+        if (vehicleOdometerMultiplier.trim() == '' || !isValidMoney(vehicleOdometerMultiplier)) {
+            hasError = true;
+            $("#inputOdometerMultiplier").addClass("is-invalid");
+        } else {
+            $("#inputOdometerMultiplier").removeClass("is-invalid");
+        }
+        //validate difference
+        if (vehicleOdometerDifference.trim() == '' || isNaN(vehicleOdometerDifference)) {
+            hasError = true;
+            $("#inputOdometerDifference").addClass("is-invalid");
+        } else {
+            $("#inputOdometerDifference").removeClass("is-invalid");
+        }
+    }
     if (hasError) {
         return;
     }
@@ -87,7 +107,10 @@ function saveVehicle(isEdit) {
         useHours: vehicleUseHours,
         extraFields: extraFields.extraFields,
         purchaseDate: vehiclePurchaseDate,
-        soldDate: vehicleSoldDate
+        soldDate: vehicleSoldDate,
+        hasOdometerAdjustment: vehicleHasOdometerAdjustment,
+        odometerMultiplier: vehicleOdometerMultiplier,
+        odometerDifference: vehicleOdometerDifference
     }, function (data) {
         if (data) {
             if (!isEdit) {
@@ -105,6 +128,14 @@ function saveVehicle(isEdit) {
         }
     });
 }
+function toggleOdometerAdjustment() {
+    var isChecked = $("#inputHasOdometerAdjustment").is(':checked');
+    if (isChecked) {
+        $("#odometerAdjustments").collapse('show');
+    } else {
+        $("#odometerAdjustments").collapse('hide');
+    }
+}
 function uploadFileAsync(event) {
     let formData = new FormData();
     formData.append("file", event.files[0]);
diff --git a/wwwroot/js/upgraderecord.js b/wwwroot/js/upgraderecord.js
index 87a5d70..032c05c 100644
--- a/wwwroot/js/upgraderecord.js
+++ b/wwwroot/js/upgraderecord.js
@@ -86,6 +86,8 @@ function getAndValidateUpgradeRecordValues() {
     var vehicleId = GetVehicleId().vehicleId;
     var upgradeRecordId = getUpgradeRecordModelData().id;
     var addReminderRecord = $("#addReminderCheck").is(":checked");
+    //Odometer Adjustments
+    upgradeMileage = GetAdjustedOdometer(upgradeRecordId, upgradeMileage);
     //validation
     var hasError = false;
     var extraFields = getAndValidateExtraFields();
diff --git a/wwwroot/js/vehicle.js b/wwwroot/js/vehicle.js
index 580d46b..d4d6015 100644
--- a/wwwroot/js/vehicle.js
+++ b/wwwroot/js/vehicle.js
@@ -490,4 +490,15 @@ function getRecordsDeltaStats(recordIds) {
         ,
         icon: "info"
     });
+}
+function GetAdjustedOdometer(id, odometerInput) {
+    //if editing an existing record or vehicle does not have odometer adjustment or input is NaN then just return the original input.
+    if (id > 0 || !GetVehicleId().hasOdometerAdjustment || isNaN(odometerInput)) {
+        return odometerInput;
+    }
+    //apply odometer adjustments first.
+    var adjustedOdometer = parseInt(odometerInput) + parseInt(GetVehicleId().odometerDifference);
+    //apply odometer multiplier.
+    adjustedOdometer *= globalParseFloat(GetVehicleId().odometerMultiplier);
+    return adjustedOdometer.toFixed(0);
 }
\ No newline at end of file