diff --git a/ecu-1x-shared.go b/ecu-1x-shared.go
index 792eb8f..690ebb3 100644
--- a/ecu-1x-shared.go
+++ b/ecu-1x-shared.go
@@ -26,6 +26,8 @@ var (
 	ecu1xStopTestPurgeValve = byte(0x08)
 	ecu1xIncreaseIdleSpeed = byte(0x91)
 	ecu1xDecreaseIdleSpeed = byte(0x92)
+	ecu1xIncreaseIgnitionAdvanceOffset = byte(0x93)
+	ecu1xDecreaseIgnitionAdvanceOffset = byte(0x94)
 
 	ecu1xUserCommands = map[string] byte{
 		"clearfaults": ecu1xRequestClearFaults,
@@ -42,6 +44,8 @@ var (
 		"stopTestPurgeValve": ecu1xStopTestPurgeValve,
 		"increaseIdleSpeed": ecu1xIncreaseIdleSpeed,
 		"decreaseIdleSpeed": ecu1xDecreaseIdleSpeed,
+		"increaseIgnitionAdvanceOffset": ecu1xIncreaseIgnitionAdvanceOffset,
+		"decreaseIgnitionAdvanceOffset": ecu1xDecreaseIgnitionAdvanceOffset,
 	}
 )
 
@@ -338,6 +342,7 @@ func ecu1xParseData80(data []byte) {
   //   // advance /= 2;
   //   // advance -= 24;
     globalDataOutput["ignition_advance_raw"] = float32(data[0x16])
+    globalDataOutput["ignition_advance"] = float32(data[0x16] / 2)
   }
   //
   // // TODO: 23-24 (x17-18) - coil time 0.002ms per lsb (16 bit)
diff --git a/web-static/index.html b/web-static/index.html
index a9cf16c..2593775 100644
--- a/web-static/index.html
+++ b/web-static/index.html
@@ -222,6 +222,10 @@ <h2><i class="fas fa-tools"></i> Commands/tests (MEMS 1.x)</h2>
       <a class="btn btn-warning" onclick="runUserAction('increaseIdleSpeed'); return false;">Increase idle speed</a>
       <a class="btn btn-warning" onclick="runUserAction('decreaseIdleSpeed'); return false;">Decrease idle speed</a>
     </div>
+    <div class="btn-group">
+      <a class="btn btn-warning" onclick="runUserAction('increaseIgnitionAdvanceOffset'); return false;">Increase ignition advance offset</a>
+      <a class="btn btn-warning" onclick="runUserAction('decreaseIgnitionAdvanceOffset'); return false;">Decrease ignition advance offset</a>
+    </div>
     <br/>
     <br/>
     <hr/>