5.7L Engine (With Automatic Transmission) The use of 89 octane “Plus” gasoline is recommended for optimum performance and fuel economy. While operating on gasoline with an octane numberoctane numberThe most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.https://en.wikipedia.org › wiki › Octane_ratingOctane rating - Wikipedia of 87, hearing a light knocking sound from the engine is not a cause for concern.
Is the Ram 5.7 Hemi a good engine?
Is The 5.7 Hemi A Good Engine? Overall, the 5.7 Hemi is an outstanding engine. It has earned a reputation as a reliable and sturdy workhorse of an engine. If you talk to anyone that owns a vehicle with a 5.7 Hemi engine, they will likely have very few, if any, bad things to say about it.
How much HP can you add to a 5.7 Hemi?
You can expect an increase of up to 15 HP after implementing these performance parts for the 5.7 Hemi. Do note that the increase in horsepower depends on the quality of the intake.