What type of gas does a HHR take?
The Chevrolet HHR generally runs on regular unleaded gasoline (87 octane). If you own the HHR SS, the turbocharged high-performance variant requires premium fuel (91 octane or higher). Always check your owner’s manual or the fuel door label for your exact model-year guidance.
Fuel type by model
The Chevrolet HHR line uses different fuel grades depending on the engine configuration. The standard engines are designed for regular unleaded gasoline, while the turbocharged HHR SS demands higher-octane premium fuel to prevent knock and maintain performance.
- Standard HHR (non-SS) and most common engines: Regular unleaded gasoline with an octane rating of 87 (AKI). Higher octane (89–93) is not required but can be used if preferred or if engine knock occurs.
- HHR SS (turbocharged): Premium gasoline, typically 91 octane or higher (premium in the United States).
All HHRs generally tolerate gasoline containing ethanol up to 10% (E10). Always check the fuel door label and the owner’s manual for exact ethanol compatibility and any model-year-specific guidance.
Other fuel considerations
While octane is the primary concern, factors such as ethanol content and regional fuel quality can affect performance and fuel economy. Using the recommended octane for your engine ensures optimal timing and power, while following ethanol guidelines helps maintain the fuel system’s health.
How to verify your vehicle’s requirements
Check the fuel filler cap label, the owner’s manual, or the Monroney sticker on the door jamb for the precise fuel recommendation for your HHR’s engine and model year. If you’re unsure, contact a Chevrolet dealer with your VIN.
Summary
In short, most HHRs take regular unleaded gasoline (87 octane). If you own an HHR SS, you should use premium gasoline (91 octane or higher). Always confirm with your manual or dealer, and note that E10 ethanol is commonly supported. Following the manufacturer’s guidance ensures optimal performance and longevity of the engine.
What happens if I put 87 instead of 91?
If you put 87 octane instead of 91 in a car that requires it, your modern engine's computer will likely adjust timing to prevent damage, but you may experience reduced performance and fuel efficiency. For a one-time mistake, drive gently and fill up with 91 octane the next time to dilute the fuel. However, consistently using lower-octane fuel in a high-compression or performance engine can lead to engine knocking and potential damage.
What to expect in the short term
- Reduced performance: You may notice less acceleration and overall power.
- Engine knocking or pinging: This is a rattling noise that can occur when the fuel pre-ignites in the cylinder.
- Decreased fuel economy: Your car may use more fuel to go the same distance.
How to mitigate the effects
- Avoid hard acceleration: Drive gently, especially at high speeds or when climbing hills, to minimize the risk of engine knocking.
- Fill up with 91 octane: When your fuel tank is low, fill it up with 91 octane to mix with the remaining 87 octane fuel. This will dilute the lower-octane fuel and raise the overall rating.
- Check your owner's manual: The manual will specify if 91 octane is a requirement or simply a recommendation.
- Be cautious with performance vehicles: Cars with turbochargers or high-compression engines are more susceptible to damage from lower-octane fuel, so it is especially important to avoid aggressive driving.
What kind of gas does an HHR take?
Fuel capacity/type: 16.2 gallons/unleaded regular (premium recommended but not required for SS model). EPA fuel economy: 19-22 miles per gallon city/29-32 highway.
What gas does a 2010 Chevy HHR take?
Fuel & MPG
| Cost to Drive | $220/mo |
|---|---|
| Fuel type | Flex-fuel (unleaded/E85) |
| EPA city/highway MPG | 22/32 MPG |
Should I put 87 or 89 in my car?
No, 89 octane gas is not inherently better than 87, but it can be necessary for certain vehicles. For most cars, using 89 octane instead of 87 will not provide benefits like increased power or efficiency and is simply a more expensive choice. However, some engines are designed to require a higher octane level (like 89 or 91) to prevent knocking and damage, especially if they have a turbocharger or higher compression ratio. You should always use the octane level recommended in your vehicle's owner's manual.
When 89 octane may be needed
- Your car's manufacturer recommends it in the owner's manual.
- Your engine has a turbocharger or supercharger.
- Your engine has a high compression ratio.
- You hear your engine "knocking" or "pinging" when using 87 octane gas.
When 89 octane is not necessary
- Your car is designed for 87 octane fuel and doesn't have a high-performance engine.
- Using 89 octane won't make your car faster or more efficient than the recommended 87.
- You will simply be paying more for no added benefit.
