Much every way: chiefly, because that unto them were committed the oracles of God.
Note 2 at Ro 3:2: The main advantage that the Jews had over others was that God had committed His Word unto them. They not only had the intuitive knowledge of God (see note 2 at Ro 1:18), but they also had a written record of God's instructions that should have served as an added restraint from departing from God. They, however, had missed the true intent of God's Law and therefore were not taking advantage of the benefits God's Word afforded them.
Note 3 at Ro 3:2: The Greek word for "oracles" is "LOGION," and it means "an utterance (of God)" (Strong's Concordance). Therefore, this is speaking of the Word of God that was committed to the Jews. In the Old Testament, the word "oracle" was also used to designate the innermost part of the temple, since the Ark of the Covenant was kept there (1Ki 6:5, 16, 19-23, 31, 7:49, 8:6, 8; 2Ch 3:16, 4:20, 5:7, 9; and Ps 28:2).
The word "oracles" is used four times in the New Testament (Ac 7:38, this verse, Heb 5:12, and 1Pe 4:11). In each of these instances, the word is clearly referring to the Word of God.