diff --git a/arielle.py b/arielle.py
index 04d2146..e8ea8b6 100644
--- a/arielle.py
+++ b/arielle.py
@@ -80,7 +80,7 @@ def main():
 			vehicle_data_last = vehicle_data
 
 			# Put vehicle data difference onto record list
-			record_list.append({'info': {'record_id': record_id, 'timestamp': timestamp}, 'data': vehicle_data_diff})
+			record_list.append({'info': {'record_id': record_id, 'timestamp': timestamp, 'is_delta': (record_id > 0)}, 'data': vehicle_data_diff})
 
 			# Store record list
 			print(f"{timestamp}: Store record #{record_id:04d}")
diff --git a/eval_records.py b/eval_records.py
index 1a52805..bc0f7dd 100644
--- a/eval_records.py
+++ b/eval_records.py
@@ -1,12 +1,13 @@
 import json
 import os
 from datetime import datetime
+from deep_diff import deep_merge
 
 BASE = "results"
 VIN = 'WVWZZZE1ZMP010760'
 YEAR = 2024
 MONTH = 10
-DAY = "18"
+DAY = ['18']
 
 
 class Endpoint:
@@ -113,6 +114,13 @@ for day in day_list:
 		with open(file_path, "r") as fp:
 			records = json.load(fp)
 			for record in records:
+				try:
+					if record['info']['is_delta']:
+						record = deep_merge(last, record['data'])
+				except KeyError:
+					pass
+
+				last = record
 				try:
 					for end_point in end_points:
 						end_point.assign(record)