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Getting to Know Your Gauges

Last updated 5 years ago

If you keep a close eye on your automobile’s gauges, you can extend the life of your car, avoid roadside emergencies, and save yourself lots of money on automobile repair. Fortunately, the five most important gauges are actually quite easy to understand.

Fuel Gauge

This gauge in your automobile lets you know how much fuel is remaining in your automobile’s fuel tank. Keep an eye on this gauge to make sure that you don’t end up running out of gas. Always pull over and refill when your gauge reads a ¼ tank, otherwise your fuel pump will wear out faster because it will be forced to operate when it is not submerged in gasoline.


For safety reasons, it’s a good idea to keep a close eye on your automobile’s speed. In addition to the danger, speeding can be costly—simply going 10 miles per hour over the speed limit on the highway can cause a 2 to 4 mpg decrease in your fuel economy, while also increasing your chances of getting a speeding ticket.

Temperature Gauge

Your automobile’s temperature gauge measures the temperature of your engine’s coolant, not your engine. If you notice the needle creeping into the hot, red range, it’s a good idea to pull over immediately and take a look under the hood of your car. If something’s wrong, don’t try to drive your car, and instead get it towed to a trustworthy automobile repair shop. Otherwise, you may end up doing serious damage to your automobile.


This gauge tells you how fast your automobile’s engine is running in rotations per minute (RPMs). Just make sure that when you accelerate you don’t run into the red area (the redline) indicated on your automobile’s tachometer.

Check Engine Light

Your automobile’s check engine light is one of the most important gauges to monitor. When it lights up, it probably just means that your car needs to have a minor issue looked at. Ignoring this light and not going to a repair shop soon, however, will almost always result in a very expensive automobile repair bill down the road.

At Greulich’s Automotive Service & Collision of Phoenix and Tucson, you can get high-quality maintenance and repair services for your automobile at a reasonable price. For more information, visit our website or call us at (480) 389-2358.


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