If you've lived in Texas long enough, you already know what's coming. The weather warms up, the bluebonnets show, the highways fill back up with people who suddenly remember how to drive badly, and gasoline prices quietly begin their annual migration north.

This is driving season. And if you watch oil markets, you've seen this rodeo before.

What Is Driving Season?

Driving season is the period roughly from Memorial Day through Labor Day when Americans climb into their vehicles at higher rates than the rest of the year. More miles driven means more gasoline burned, which means more crude oil consumed, which means upward pressure on prices.

But here's the thing most people miss: the price move typically starts well before Memorial Day. Markets price in expectations. By the time you're actually sitting in traffic on I-10 with a full tank, traders already baked that demand into the forward curve weeks ago.

March is when the setup begins. You're early if you're paying attention now.

The Refinery Switch Nobody Talks About

Here's where it gets more interesting than most financial sites bother to explain.

There are actually two gasoline blends in the U.S.: winter blend and summer blend. Summer blend is cleaner-burning, which reduces smog in the heat. It's also more expensive and more complicated to produce.

Every spring, refineries have to physically switch their production from winter blend to summer blend. During that transition, typically February through April, refineries often take units offline for scheduled maintenance. This is called the spring turnaround season, and it temporarily reduces gasoline supply just as demand is about to pick up.

Supply tightening while demand strengthens. Basic arithmetic from there.

Houston in March: Already Feeling It

From Houston, the spring turnaround is more than an abstract market concept, it's a lived reality. The Gulf Coast is home to the largest concentration of refining capacity in the country. When a major unit goes down at a Baytown or Beaumont refinery, regional gasoline prices can tick up within days.

If you're filling up in Houston and grumbling about the price, there's a non-trivial chance the answer is "something at a Ship Channel refinery is down for maintenance." Welcome to the energy capital of the world, where the pump price is almost always local news.

What the Calendar Says

Historically, WTI crude oil and RBOB gasoline futures tend to see their strongest seasonal performance between February and late April, ahead of the actual peak driving period. The pattern isn't guaranteed, geopolitics, a surprise inventory build, or a macro demand shock can overwhelm seasonal tendencies in any given year.

But as a base case heading into spring 2026, traders are watching:

  • Refinery utilization rates, if they drop sharply during turnarounds, watch crack spreads widen
  • EIA weekly gasoline inventory data (released Wednesdays, 10:30 AM ET) for draw signals
  • OPEC+ compliance, are member producers holding to their pledged cuts, or quietly cheating at the margins?
  • Implied gasoline demand in the EIA data as a real-time proxy for driving activity

It Works Until It Doesn't

The seasonal trade is one of the more reliable setups in energy markets, but "reliable" in commodity trading is doing a lot of heavy lifting in that sentence. Last year had a geopolitical surprise. The year before had an unexpected SPR release. Pick your macro plot twist.

Still, if I had to name one seasonal pattern in energy worth understanding as a retail investor or casual market watcher, this is it. It plays out with enough consistency that even the major banks publish dedicated research on it every February.

March is when the setup starts. By May you'll know if it worked. The bluebonnets will be gone either way.

This article is for informational purposes only and does not constitute investment advice. Oil markets are volatile. Past seasonal patterns are not a guarantee of future performance.