Can the 2009 Chevrolet HHR use E85?

Only the flex-fuel engines: the 2.2L 4-cylinder and 2.4L 4-cylinder. The other engines must use gasoline.

What gas does the 2009 Chevrolet HHR take?

No. The EPA rates every 2009 Chevrolet HHR engine on regular gasoline.

The EPA rates every 2009 Chevrolet HHR engine on regular gasoline. The 2.2L 4-cylinder and 2.4L 4-cylinder are flex-fuel and can also run on E85.

6 EPA-certified configurations listed for the 2009 Chevrolet HHR.
Regular gasoline is what the EPA rated it on - paying for premium buys nothing unless the manual asks for it.
Only the engines marked flex-fuel can use E85.

2009 Chevrolet HHR: every EPA-listed configuration
Engine	Transmission	Drive	Rated fuel	E85
2.0L 4-cylinder turbo	4-speed automatic	FWD	regular gasoline	No
2.0L 4-cylinder turbo	5-speed manual	FWD	regular gasoline	No
2.2L 4-cylinder	4-speed automatic	FWD	regular gasoline	Yes (flex-fuel)
2.2L 4-cylinder	5-speed manual	FWD	regular gasoline	Yes (flex-fuel)
2.4L 4-cylinder	4-speed automatic	FWD	regular gasoline	Yes (flex-fuel)
2.4L 4-cylinder	5-speed manual	FWD	regular gasoline	Yes (flex-fuel)

Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov). Each row is one certified configuration; a trim or option not sold in a configuration is not listed.

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