Understanding Gas Grades: Which One Should You Use and Why It Matters

Gasoline prices can be a challenge. And we all like to cut costs when and where we can. So, when you pull up to the pump, you may notice different gas grades—typically 87, 89, and 91 or 93; each with a different price. But, is it a good idea to go with the lowest cost? And will this affect my car or truck’s health or milage? To answer these questions, the experts at Tracy’s Tire Pros and Automotive explain the different gas grades so you can decide which grade is best for you and your budget.

Your Gasoline Options:

These numbers represent the octane rating and the fuel’s ability to resist “knocking” or “pinging” during combustion. And Knocking or pinging happens when the air-fuel mixture in the cylinder self-ignites due to high pressure and heat before the spark plug fires. The result is an uncontrolled explosion or shock wave that collides with the normal combustion process, leading to a “knock” or “ping.” This phenomenon can damage engine components over time, including pistons, bearings, and valves, and reduce engine efficiency.

1. Regular (87 Octane): Most cars run perfectly on regular gas. And it’s the most affordable option, providing sufficient performance for standard engines designed for lower compression.
2. Mid-Grade (89 Octane): Some vehicles recommend mid-grade gas, offering slightly higher resistance to knocking. And it may be required for cars with engines designed for slightly higher performance.
3. Premium (91-93 Octane): High-performance and luxury vehicles often require premium gas. Because, the higher octane prevents knocking in high-compression engines. And this boosts performance and efficiency.

Why It Matters

Using the recommended gas grade ensures the best engine performance and fuel efficiency. And while using a higher grade than necessary won’t necessarily harm your engine, it won’t provide any extra benefits either—just a higher price at the pump. Whereas, on the other hand, using a lower grade than recommended can cause engine knocking, reduce efficiency, and potentially damage the engine over time.

Get the best out of your vehicle by check your owner’s manual and use the gas grade it recommends.

Tracy’s Tire Pros can help you with any automotive issues that you may have. And they have three locations for your convenience:  West Maple Street auto care and auto repair, East First Street N. and West 21st Street N. And, Tracy’s Automotive is a proud dealer for Jasper Engines and Vogue Performance Exhaust systems.

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