i have been using this additive in my 1969 alfa romeo spider....
https://www.amazon.com/ZDDPPlus-Eng...coding=UTF8&psc=1&refRID=2Q4PK6XJKYEKZ7WDRV38
i just passed a smog test (in california) for my bertone 1986 x1/9...i know zinc can hurt the converter, and it goes without saying that i'm worried about putting zinc in the bertone....sooo difficult to pass smog at times in this state (although the bertone passed first time no problem)
guess i'm looking for opinions on this...usually use castrol gtx 20/50 with the additive in my alfa..
https://www.amazon.com/ZDDPPlus-Eng...coding=UTF8&psc=1&refRID=2Q4PK6XJKYEKZ7WDRV38
i just passed a smog test (in california) for my bertone 1986 x1/9...i know zinc can hurt the converter, and it goes without saying that i'm worried about putting zinc in the bertone....sooo difficult to pass smog at times in this state (although the bertone passed first time no problem)
guess i'm looking for opinions on this...usually use castrol gtx 20/50 with the additive in my alfa..