Is it OK to use fuel additives and cleaners in 5.7 Hemi engines?

It's generally considered safe to use fuel additives and cleaners in most engines, including the 5.7 Hemi. However, it's always best to consult with the owner's manual or a qualified mechanic before using any additives or cleaners.

Most fuel additives are safe and can help to improve engine performance and efficiency, but some may not be compatible with certain engine types or components. It's important to read the product labels carefully and follow the manufacturer's instructions to avoid any potential issues.

If you're unsure about whether or not an additive is safe to use, it's a good idea to avoid it or to consult with an expert.