My '90 Legend coupe has the lifter tick that appears on a number of this model Acuras. I know it doesn't really hurt anything, but it's annoying. The additives don't really work, and I don't want to spend a couple grand to replace the lifters. I saw a 0W (zero weight) performance synthetic oil and wondered if that might help. Anyone had any luck with any product? The tick continues to get worse over time.