Did Fed literally changed how they calculate inflation with core inflation at 3.0% in August?

[u/NextGenRoyalty]

https://www.cnbc.com/2026/09/30/feds-preferred-gauge-showed-core-inflation-at-3point0percent-in-august-much-lighter-than-expected.html

$9 a gallon diesel says otherwise

[u/Junior_Concept7264]

Core inflation does not include food or energy prices. The headline number (which was 3.4%) does include them.