Selecting the Right Octane

 

What are octane ratings?
Octane ratings measure a gasoline's ability to resist engine knock — a rattling or pinging sound that results from premature ignition of the compressed fuel-air mixture in one or more cylinders. 

CountryMark offers gasoline in five octane grades: regular (87 octane), mid-grade (88, 89 and 90 octane), and premium (93 octane).

  


             

   

What's the right octane level for your car?
Check your owner's manual. Regular octane is recommended for most cars. However, some cars with high compression engines, like sports cars and certain luxury cars, need mid-grade or premium gasoline to prevent knocking. 

How can you tell if you're using the right octane level? Listen to your car's engine. If it doesn't knock when you use the recommended octane, you're using the right grade of gasoline.

Will higher octane gasoline clean your engine better?
No, as a rule, high octane gasoline doesn’t outperform regular octane in preventing engine deposits from forming, in removing them, or in cleaning your car's engine. The best advice for avoiding and/or eliminating engine deposits is burning a TOP TIER gasoline

Should you ever switch to a higher octane gasoline?
A few car engines may knock or ping even if you use the recommended octane. If this happens, try switching to the next highest octane grade. In many cases, switching to the mid-grade or premium-grade gasoline will eliminate the knock. If the knocking or pinging continues after one or two fill-ups, you may need a tune-up or some other repair. 

A car's octane requirements can also change as mileage increases. As mileage accumulates, carbon deposits can form in the combustion chamber, which can increase the incidence of engine knock. Deposits raise the compression ratio and can get very hot, thus serving as a source of ignition.

Will knocking harm my engine?
Occasional light knocking or pinging won't harm your engine, and doesn't mean you need a higher octane. But a heavy or persistent knock can lead to loss of power, and overheating of engine parts such as valves, pistons and spark plugs. In severe cases, piston heads can crack or burn, and engine life can be shortened.

Where can I purchase CountryMark PLUS gasoline? 
Visit our growing list of CountryMark retail fuel stations, or contact a CountryMark branded dealer to discuss fuel delivery options.

CountryMark Fueling Freedom events raise over $53,000 for local military families
CountryMark’s Fueling Freedom events on June 25 raised more than $53,000 to support local National Guard Family Readiness Groups.
 
CountryMark fuel stations to raise money for local military families through Fueling Freedom program
When you fill up at a participating CountryMark fuel station on Friday, June 25 between noon and 5pm, CountryMark and its branded dealers will donate 50 cents for every gallon of fuel pumped to local National Guard Family Readiness Groups. Customers are also invited to register to win a $150 gift card.
 
CountryMark Supports Indiana Ethanol Bill
An unknown Ohio group mailed postcards earlier this month to a number of Indiana households and businesses that claimed CountryMark "hates ethanol" because of CountryMark's support for Indiana Senate Bill 303, also known as the ethanol or gasohol bill. SB 303 seeks to update Indiana's definition of gasohol and would make selling gasoline with a 15 percent blend of ethanol legal year round in the state of Indiana.
 
CountryMark helps cover mask costs for local students in Posey County
CountryMark is helping to cover the costs of face masks for students attending school in the Metropolitan School District of North Posey County and the Metropolitan School District of Mount Vernon Indiana.
 
CountryMark and branded dealers give back through adjusted Fueling Freedom program
For over 10 years, CountryMark has hosted Fueling Freedom events at CountryMark branded fueling stations across Indiana, Illinois and Ohio. During these events, CountryMark and branded dealers have donated 50 cents for every gallon of fuel pumped to local National Guard Soldier and Family Readiness Groups
 
 

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