phosphorus in gas additives?

[stangguy]

What I am getting at is, I am wondering if the common UCL that I use, MMO and TCW3, have any phosphorus in them due to the fact that obviously it is not good for the cats. I know it is fine for my old 65 mustang, but the 17 Frontier and the 98 Mustang are the vehicles I am wondering about. I am a believer in UCL's, although I have no proof of any advantage of it, especially on newer stuff, but I still like it unless of course it will do harm, and not just to my pocketbook.
Or, maybe even if they do have some small amount of phosphorus, that it is to little to be a problem, as to the small amount actually consumed. Please inform me, and don't just tell that I don't need it.

 

[Jetronic]

check the msds for the products you are considering. UCL or tcw3 don't need phosphorous so shouldn't have any. The top compression ring area has a naturally high concentration of zddp in a 4 stroke engine as the base oils that carried it there evaporate. TCW3 should be ashless.

MMO, no clue.