Originally Posted By: oil_film_movies
Valvoline might be referring to the Sequence IVA standard wear test, which must be less than 90 microns to pass to get SN GF-5. Valv Synpower 5w30 has shown 20 microns in the past. Therefore, if VWB gets 40 microns (still passing by a lot), then that might be what they are basing the claim on their bottle/jug labels saying the Synpower has 50% better wear.
That would have read as 100% improvement.
Claiming percentage improvements over low'ish # , instead of a high'ish threshold limits (say,90 micro) is playing with numerics and meaningless in engineering other than 'boosting' marketing claims.