Just use what the manual tells you to use. Just because something is more advanced does not necessarily mean that it's safe to use in your vehicle, because the more advanced item was engineered to be used in a more advanced vehicle, which are constructed using a far wider selection of materials now; if something was re-engineered, it's likely it was done to address issues that didn't exist previously.

Also, cracked/seperated plastic radiator heads are a common thing in just about every vehicle that uses them these days; granted, that's more an inferior parts issue than anything else.

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A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.