Only bp and Amoco gasolines have Invigorate®, bp’s exclusive proprietary detergent additive. Invigorate® contains active molecules that start cleaning and protecting your engine as soon as you start the engine. All grades of bp and Amoco gasolines with Invigorate® go above and beyond US government minimum detergent standards to provide our customers the benefits they are looking for. Engine cleanliness is important because dirty deposits from minimum detergent fuels form in engines and can lead to a variety of problems – hesitation, rough starts, loss in fuel economy, and increased emissions, to name a few.