~ 4-5 yrs ago, I bought some Castrol Start-Up(IIRC, it was SM/GF-4) on a clearance rack at Pep Boys and used it in my old Firebird. It did well with no startup noises(after the car sat for several months) and allowed the engine to run nice and smooth compared to some older oils that this engine has seen in the past 30 years.
When I bought this car 33 years ago, the SE/SF oils(regardless of brand/weight) caused some light ticking. Over the years, I have noticed as the oils changed their ASE Classification(s),(around the time of SH/SJ), the engine became quieter in terms of the odd noises. Today, I couldn't be happier!
Switching to HM oils such as MaxLife & DEFY(the last 4 years), the engine has been like new and even better/quieter with the DEFY.