By Julianne Geiger of OilPrice.com

The U.S. Energy Information Administration just delivered a statistical shock: July’s monthly data shows U.S. total liquids output hitting a record 21.218 million barrels per day, nearly 500,000 bpd higher than the agency’s weekly estimates had implied. Crude production came in at 13.642 million bpd, with natural gas liquids at 7.577 million bpd—both stronger than traders had been working with.

The upward revision wasn’t just on the supply side. EIA pegged total product supplied, its proxy for demand, at 20.984 mb/d, some 344,000 bpd higher than weekly data had suggested. Gasoline, diesel, and jet fuel consumption all moved higher, underscoring that U.S. demand hasn’t softened as much as some bearish calls had assumed.

For perspective, EIA’s weekly series for July had implied closer to 20.7 million bpd of total liquids production and around 20.64 million bpd of demand. Those preliminary estimates now look understated compared to the more comprehensive monthly survey data.

The revisions matter because the market leans heavily on the weekly numbers for near-term trading signals, even though they are based on modeling and estimates rather than hard surveys. When the monthly data later shows reality running hotter, it can force a rethink on supply-demand balances.

The new figures will only add to the debate over how much slack the U.S. oil machine still has. Shale output had been assumed to be flattening, but the latest record indicates there could be far more resilience than expected. On the demand side, the stronger consumption data helps explain why inventories haven’t built as quickly as some forecasts suggest.

With the EIA revising up both sides of the ledger—production and demand—it leaves the U.S. oil market looking tighter than weekly data suggested. Traders will now be recalibrating their models accordingly. For OPEC, the message is clear: the U.S. isn’t done surprising the market.