diff --git a/app/src/main/java/info/nightscout/androidaps/Constants.java b/app/src/main/java/info/nightscout/androidaps/Constants.java
index aeb4977584..56fd2b6de9 100644
--- a/app/src/main/java/info/nightscout/androidaps/Constants.java
+++ b/app/src/main/java/info/nightscout/androidaps/Constants.java
@@ -59,6 +59,7 @@ public class Constants {
 
     //Autosens
     public static final double DEVIATION_TO_BE_EQUAL = 2.0;
+    public static final double DEFAULT_MAX_ABSORPTION_TIME = 6.0;
 
     // Pump
     public static final int PUMP_MAX_CONNECTION_TIME_IN_SECONDS = 120 - 1;
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java
index 397656306b..4fe46f3a80 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/AutosensData.java
@@ -7,9 +7,11 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
+import info.nightscout.androidaps.Constants;
 import info.nightscout.androidaps.MainApp;
 import info.nightscout.androidaps.R;
 import info.nightscout.androidaps.data.Profile;
+import info.nightscout.androidaps.plugins.OpenAPSSMB.SMBDefaults;
 import info.nightscout.androidaps.plugins.Treatments.Treatment;
 import info.nightscout.androidaps.interfaces.PluginType;
 import info.nightscout.androidaps.plugins.SensitivityAAPS.SensitivityAAPSPlugin;
@@ -34,14 +36,14 @@ public class AutosensData {
             carbs = t.carbs;
             remaining = t.carbs;
             if (SensitivityAAPSPlugin.getPlugin().isEnabled(PluginType.SENSITIVITY) || SensitivityWeightedAveragePlugin.getPlugin().isEnabled(PluginType.SENSITIVITY)) {
-                double maxAbsorptionHours = SP.getDouble(R.string.key_absorption_maxtime, 4d);
+                double maxAbsorptionHours = SP.getDouble(R.string.key_absorption_maxtime, Constants.DEFAULT_MAX_ABSORPTION_TIME);
                 Profile profile = MainApp.getConfigBuilder().getProfile(t.date);
                 double sens = Profile.toMgdl(profile.getIsf(t.date), profile.getUnits());
                 double ic = profile.getIc(t.date);
                 min5minCarbImpact = t.carbs / (maxAbsorptionHours * 60 / 5) * sens / ic;
                 log.debug("Min 5m carbs impact for " + carbs + "g @" + new Date(t.date).toLocaleString() + " for " + maxAbsorptionHours + "h calculated to " + min5minCarbImpact + " ISF: " + sens + " IC: " + ic);
             } else {
-                min5minCarbImpact = SP.getDouble("openapsama_min_5m_carbimpact", 3.0);
+                min5minCarbImpact = SP.getDouble("openapsama_min_5m_carbimpact", SMBDefaults.min_5m_carbimpact);
             }
         }
     }
@@ -73,7 +75,7 @@ public class AutosensData {
         return (int) ((System.currentTimeMillis() - time) / 1000 / 60);
     }
 
-    // remove carbs older than 4h
+    // remove carbs older than timeframe
     public void removeOldCarbs(long toTime) {
         for (int i = 0; i < activeCarbsList.size(); i++) {
             CarbsInPast c = activeCarbsList.get(i);
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java
index e3f12cbea6..7789f8a5a6 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/IobCobCalculator/IobCobThread.java
@@ -20,12 +20,17 @@ import info.nightscout.androidaps.MainApp;
 import info.nightscout.androidaps.data.IobTotal;
 import info.nightscout.androidaps.data.Profile;
 import info.nightscout.androidaps.db.BgReading;
+import info.nightscout.androidaps.interfaces.PluginType;
+import info.nightscout.androidaps.plugins.OpenAPSSMB.SMBDefaults;
+import info.nightscout.androidaps.plugins.SensitivityAAPS.SensitivityAAPSPlugin;
+import info.nightscout.androidaps.plugins.SensitivityWeightedAverage.SensitivityWeightedAveragePlugin;
 import info.nightscout.androidaps.plugins.Treatments.Treatment;
 import info.nightscout.androidaps.events.Event;
 import info.nightscout.androidaps.plugins.IobCobCalculator.events.EventAutosensCalculationFinished;
 import info.nightscout.androidaps.plugins.Treatments.TreatmentsPlugin;
 import info.nightscout.utils.DateUtil;
 import info.nightscout.utils.FabricPrivacy;
+import info.nightscout.utils.SP;
 
 /**
  * Created by mike on 23.01.2018.
@@ -199,9 +204,15 @@ public class IobCobThread extends Thread {
                     if (previous != null && previous.cob > 0) {
                         // calculate sum of min carb impact from all active treatments
                         double totalMinCarbsImpact = 0d;
-                        for (int ii = 0; ii < autosensData.activeCarbsList.size(); ++ii) {
-                            AutosensData.CarbsInPast c = autosensData.activeCarbsList.get(ii);
-                            totalMinCarbsImpact += c.min5minCarbImpact;
+                        if (SensitivityAAPSPlugin.getPlugin().isEnabled(PluginType.SENSITIVITY) || SensitivityWeightedAveragePlugin.getPlugin().isEnabled(PluginType.SENSITIVITY)) {
+                            //when the impact depends on a max time, sum them up as smaller carb sizes make them smaller
+                            for (int ii = 0; ii < autosensData.activeCarbsList.size(); ++ii) {
+                                AutosensData.CarbsInPast c = autosensData.activeCarbsList.get(ii);
+                                totalMinCarbsImpact += c.min5minCarbImpact;
+                            }
+                        } else {
+                            //Oref sensitivity
+                            totalMinCarbsImpact = SP.getDouble("openapsama_min_5m_carbimpact", SMBDefaults.min_5m_carbimpact);
                         }
 
                         // figure out how many carbs that represents
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8dcce74685..c721b7adb5 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -619,6 +619,8 @@
     <string name="sensitivityaaps">Sensitivity AAPS</string>
     <string name="absorptionsettings_title">Absorption settings</string>
     <string name="key_absorption_maxtime" translatable="false">absorption_maxtime</string>
+    <string name="key_absorption_cutoff" translatable="false">absorption_cutoff</string>
+
     <string name="absorption_maxtime_title">Meal max absorption time [h]</string>
     <string name="absorption_maxtime_summary">Time in hours where is expected all carbs from meal will be absorbed</string>
     <string name="key_rangetodisplay" translatable="false">rangetodisplay</string>
diff --git a/app/src/main/res/xml/pref_absorption_oref0.xml b/app/src/main/res/xml/pref_absorption_oref0.xml
index bac14608c7..4cdd7fb8f0 100644
--- a/app/src/main/res/xml/pref_absorption_oref0.xml
+++ b/app/src/main/res/xml/pref_absorption_oref0.xml
@@ -28,7 +28,7 @@
             android:maxLines="20"
             android:title="@string/absorption_cutoff_title"
             android:dialogMessage="@string/absorption_cutoff_summary"
-            android:key="@string/key_absorption_maxtime" />
+            android:key="@string/key_absorption_cutoff" />
 
     </PreferenceCategory>
 </PreferenceScreen>