>
>>Note that the other Amsoil products, while they cannot be API certified
>>due to the ZDDP level, do use synthetic base stock. Don't use them in
>>vehicles with catalytic converters, despite what your local MLM person
>>may tell you. Mobil 1 EP does use synthetic base stock.
>
>They have no effect on catalytic converters. I have no idea where you
>came up with that one.
Sure do - that's why they've been removed from current automotive spec oil. At least that's the official line.