Adding AutoOiler Patch that halves times to oil consists and the start delay, if a caboose is presentin the consist that the ai engineer is in.

TweaksAndThings/Extensions/AutoEngineer_Extensions.cs

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+using Model.AI;
+using System.Collections;
+using UnityEngine;
+
+namespace RMROC451.TweaksAndThings.Extensions
+{
+    internal static class AutoEngineer_Extensions
+    {
+        private static float CabooseHalvedFloat(this float input, bool hasCaboose) =>
+            hasCaboose ? input / 2 : input;
+
+        private static float CabooseAutoOilerLimit(this bool hasCaboose) =>
+            hasCaboose ? 0.99f : AutoOiler.OilIfBelow;
+
+        public static IEnumerator MrocAutoOilerLoop(this AutoOiler oiler, Serilog.ILogger _log)
+        {
+            int originIndex = oiler.FindOriginIndex();
+            bool hasCaboose = oiler._cars.CabooseInConsist();
+            if (originIndex < 0)
+            {
+                _log.Error("Couldn't find origin car {car}", oiler._originCar);
+                oiler._coroutine = null;
+                yield break;
+            }
+            oiler._reverse = originIndex > oiler._cars.Count - originIndex;
+            _log.Information(
+                "AutoOiler {name} starting, rev = {reverse}, caboose halving adjustment = {hasCaboose}, oil limit = {limit}", 
+                oiler.name, 
+                oiler._reverse, 
+                hasCaboose, 
+                hasCaboose.CabooseAutoOilerLimit()
+            );
+            while (true)
+            {
+                yield return new WaitForSeconds(AutoOiler.StartDelay.CabooseHalvedFloat(hasCaboose));
+                int carIndex = originIndex;
+                float adjustedTimeToWalk = AutoOiler.TimeToWalkCar.CabooseHalvedFloat(hasCaboose);
+                do
+                {
+                    if (oiler.TryGetCar(carIndex, out var car))
+                    {
+                        float num = 0f;
+                        float origOil = car.Oiled;
+                        if (car.NeedsOiling && car.Oiled < hasCaboose.CabooseAutoOilerLimit())
+                        {
+                            float num2 = 1f - car.Oiled;
+                            car.OffsetOiled(num2);
+                            float num3 = num2 * AutoOiler.TimeToFullyOil.CabooseHalvedFloat(hasCaboose);
+                            num += num3;
+                            oiler._pendingRunDuration += num3;
+                            oiler._oiledCount++;
+                            _log.Information("AutoOiler {name}: oiled {car} from {orig} => {new}", oiler.name, car, origOil, car.Oiled);
+                        }
+                        num += adjustedTimeToWalk;
+                        oiler._pendingRunDuration += adjustedTimeToWalk;
+                        yield return new WaitForSeconds(num);
+                    }
+                    carIndex = oiler.NextIndex(carIndex);
+                }
+                while (oiler.InBounds(carIndex));
+                oiler._reverse = !oiler._reverse;
+                oiler.PayWages();
+            }
+        }
+    }
+}

TweaksAndThings/Patches/AutoOiler_Loop_Patch.cs

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+using HarmonyLib;
+using Model.AI;
+using Railloader;
+using RMROC451.TweaksAndThings.Extensions;
+using Serilog;
+using System.Collections;
+
+namespace RMROC451.TweaksAndThings.Patches;
+
+[HarmonyPatch(typeof(AutoOiler))]
+[HarmonyPatch(nameof(AutoOiler.Loop))]
+[HarmonyPatchCategory("RMROC451TweaksAndThings")]
+internal class AutoOiler_Loop_Patch
+{
+    private static ILogger _log => Log.ForContext<AutoOiler_Loop_Patch>();
+
+    public static bool Prefix(AutoOiler __instance, ref IEnumerator __result)
+    {
+        TweaksAndThingsPlugin tweaksAndThings = SingletonPluginBase<TweaksAndThingsPlugin>.Shared;
+        if (!tweaksAndThings.IsEnabled) return true;
+        bool buttonsHaveCost = tweaksAndThings?.settings?.EndGearHelpersRequirePayment ?? false;
+
+        if (buttonsHaveCost)__result = __instance.MrocAutoOilerLoop(_log);
+        return !buttonsHaveCost; //only hit this if !buttonsHaveCost, since Loop is a coroutine
+    }
+}