I've been an addicted to Wynns fuel adictives and it's been a long since I last used it on my Astra. A few days ago I've purchased a 325 ml bottle of Wynns injector cleaner for diesel engines. I was amazed with the results, once again! Before adding the product my car's range was about 750 km (465,83 miles) and now I can travel about 920 km (571,42 miles) with a single tank. I've been using Wynns adictives since 2000.