Amsoil Engine flush is NOT an "additive" and this whole boutique thing is making me puke. It's $3.45 a can!
I don't think Amsoil said the product didn't contain kerosene, they said: "Our product is a petroleum distillate but it is not kerosene. AMSOIL AEF has lubricating properties that kerosene does not...."
As for the topic, I agree with Frank at AutoRx that some patina is normal. Thick varnish isn't. When I buy used cars they always have some level of patina and some have varnish. Getting non-wear metals back to new aluminum or new steel in these vehicles is nearly impossible, and somewhat pointless.
I don't think Amsoil said the product didn't contain kerosene, they said: "Our product is a petroleum distillate but it is not kerosene. AMSOIL AEF has lubricating properties that kerosene does not...."
As for the topic, I agree with Frank at AutoRx that some patina is normal. Thick varnish isn't. When I buy used cars they always have some level of patina and some have varnish. Getting non-wear metals back to new aluminum or new steel in these vehicles is nearly impossible, and somewhat pointless.