← FillWindow

Time your fuel buying across the whole fleet

California gas moves most weeks, and a fleet buys a lot of it. We publish one call a week - fill now, or wait - and grade every call in public. The same call, applied across your vehicles.

What the timing is worth

Across 248 graded calls, following our timing was worth an average of 6.0¢/gal. At that rate, a 50-vehicle fleet works out to roughly $2,300/year.

Definition: for every week we published a direction, the realized gain per gallon from filling on the called week versus the alternative, averaged over every call including the ones we got wrong. Annual figure assumes each vehicle fills 15 gallons a week, 52 weeks. From a mix of live calls and backtest history.

What a pilot gets today

  • ✓The weekly California fill call by email, the moment the EIA print lands Monday.
  • ✓The same call as a CSV, so you can drop it into whatever you already run on.
  • ✓The public evidence page: every call we have ever made, graded, including the misses.

On the roadmap - not yet built

  • ○Per-region calls beyond statewide California, as the data supports them.
  • ○An API, so the call lands in your systems without a human step. We will not promise a date until it exists.
  • ○Wholesale spot signals feeding the forecast, which we expect to sharpen the weekly call.

Everything above is roadmap, labeled as such on purpose. A pilot gets what is in the section above it, not this one.

Talk to us about a pilot

Tell us the fleet size and where you run. Dilip will follow up - this is a conversation, not a checkout.

This starts a conversation, not a subscription. No card, no account.

See every forecast we have made →