wemay
Site Donor 2023
If an oil is certified SN and even GF-5, it must meet usage requirements of all oils meeting the same specs, and currently, most HM oils do. Every additive within a spec must remain inside an approved range. Although the elastomers (conditioners) are increased for HM oils, they too must fall within this range to be certified API SN.
You can use these oils from new.
You can use these oils from new.