Just supply a bottle of Penrite HPR5 5W40 or 10 Tenths Racing 10W40. Don't pay a premium for oils that you won't see a benefit from on the street.
Also Chaosmaster, the 10 Tenths Racing/Premium range of oils is a mix of Group IV & V bases, as they have both PAO & Ester, along with the rest of the additives Penrite are well known for
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