I have a 97 cadillac seville witht the north star engine in it,GM had an oil consumption problem with that engine and it was costly to fix the issue unless you have it under warranty which i do not,it eats up oil like it eats gas,i usually put 3 quartz of oil in it every month,since i put your stuff in it, i usually dont have to put any in untill after 3 months,it slowed the consumption a ton and now i dont have to spend all that money on oil burning.thanks for a great product

kyle george