People dont run Lucas to be "green minded" not sure where you got that from. I've actually seen Lucas unstick tapping lifters on several occasions in customers engines so it does its job. (and I can actually see results, that helps the credibility along
)On one occasion the customer changed the oil several times within a couple weeks. They added some cheap oil additive with no success. I changed it once with one bottle of Lucas and it was quiet as a mouse within 3 miles.