ExxonMobil stations throughout the U.S. are now accepting Apple Watch payments.

Customers will need to download the Speedpass+ app, which lets you settle your gas bill with a tap of your wrist. You’ll have the option to use Apple Pay, or input your credit card information manually.

After climbing up the Fortune 500 rankings the past few years, Apple is standing firm in the No. 5 spot it reached last year.

Walmart grabbed the top spot, followed by oil giants Exxon and Chevron, with Apple hanging in thanks to strong iPhone and Mac sales, although
Fortune noted slumping iPad sales are a point of concern.

Two years ago, Apple overtook Exxon as the world’s most valuable company. It was a heck of a feat for a Silicon Valley company: for the first time, the world seemed to value silicon computer chips more than the bubbling, black goo of long dead dinosaurs. The future seemed rosy, and in the following months, Apple’s share price eventually rose to over $700 a share… before cratering thanks to bizarre Wall Street pessimism.

Somehow, though, even though analysts are bleaker about Apple’s futures than they have ever been, Cupertino has once more managed to claw the title of world’s most valuable company from Exxon. How?

Here’s a cautionary tale that should turn you into a hoarder: a contract of a nearly bankrupt tech company in the mid-1990s is now headed for the auction block with a $150,000 price tag. The company is Apple and the document is the tech giant’s founding contract with signatures of Steve Jobs, Steve Wozniak and Ronald Wayne — who must be kicking himself at this very moment.

Following the news that Apple has more cash on hand than the US government, it’s just been announced that Apple has surpassed ExxonMobil to become the world’s most valuable publicly traded company.

Apple’s reign didn’t last that long, as Business Insider is reporting that Exxon is now back on top.