Tips – Engine Icon https://engineicon.com Latest car news and advice blog Tue, 14 Jul 2026 02:07:52 +0000 en-US hourly 1 https://wordpress.org/?v=7.1 https://engineicon.com/wp-content/uploads/2026/01/cropped-ME_favicon-1-32x32.png Tips – Engine Icon https://engineicon.com 32 32 Car Air Conditioning: Tips To Keep It in Shape and Cold https://engineicon.com/car-air-conditioning-tips-to-keep-it-in-shape-and-cold/ Tue, 07 Apr 2026 00:00:24 +0000 https://engineicon.com/car-air-conditioning-tips-to-keep-it-in-shape-and-cold/

As hot summer weather approaches, your car’s interior needs plenty of cool air to keep you and your crew comfortable around town. Too often, we take car air conditioning for granted. But having cold air in hot weather is not just another feature. It’s a necessity.

If you notice any unusual noises, odors, condensation, or temperature fluctuations, there’s a chance you could have an AC issue.

Car Air Conditioning: Tips To Keep It in Shape and ColdCar Air Conditioning: Tips To Keep It in Shape and Cold

So what can we do to encourage the health of our climate control system before car AC repair is needed? How can we help our car air conditioner operate better? We asked Kelley Blue Book’s in-house service and maintenance expert, Gary Hardesty, an A.S.E. certified master technician, to share his AC expertise, and these are our top 10 tips for keeping your AC in tip-top shape.

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1. Watch High Engine Temperatures on Steep Grades

car traveling up a steep grade with air conditioning oncar traveling up a steep grade with air conditioning on

If your summer getaway means heading for the mountains and you’re traveling uphill on a steep grade, loaded with people and gear in hot weather, keep an eye on the engine temperature. Running the air conditioner puts extra strain on your engine, which can contribute to overheating. If you see the engine temp gauge rising, Hardesty says to turn your heat on full blast for a few minutes to help lower the engine temperature and temporarily lessen the burden on the car’s cooling system.

2. Keep “Inducts” Under the Windshield Dry and Clear

Water, dirt, and leaves at the base of the windshield reduce operating efficiency and can contribute to mold in the climate control system. The area where the hood and windshield meet is an optimal collection point for debris like pine needles and windblown leaves. Unfortunately, the air conditioning intake is in that area, making it a bad place for old leaves to decay. Hardesty suggests regularly removing any obstructions that restrict airflow, as well as smaller debris that could enter the air distribution box and plug the water drains.

3. When Odors are Detected, Act Quickly

Strange smells coming from your car’s air vents can be a sign of serious problems, but some odors may just be from the previous owner, who was a smoker or allowed pet odors to accumulate. In these cases, Hardesty says placing orange peel on your car’s floor for a few days will help. Other options include spraying an odor neutralizer like Ozium into the vents or changing the air conditioning filter.

But there are some odors to watch out for that might suggest a more significant issue, including gasoline, mildew, or a sweet odor.

Car Air Conditioning: Tips To Keep It in Shape and ColdCar Air Conditioning: Tips To Keep It in Shape and Cold

4. Read the Air Conditioning Section of Your Owner’s Manual

Your owner’s manual is full of recommendations and requirements for operating the vehicle, including its climate control and engine cooling systems. Refer to its guidelines for antifreeze coolant to give proper corrosion protection and help prevent overheating. In case your summer travel plans don’t include a road trip, that book in your glovebox also contains information on maintaining the air conditioning system when the vehicle is unused for extended periods.

5. Add Air Conditioning Checkpoints to Your Maintenance Schedule

Mechanic With Checklist Including Car Air ConditioningMechanic With Checklist Including Car Air Conditioning

Always follow the manufacturer’s recommended maintenance schedule, which includes checking system performance to determine if a car air conditioning recharge is needed. Routine inspection may detect potential problems before they become troublesome. Staying on top of AC maintenance can help improve your fuel economy while keeping the car’s interior comfortable for you and your passengers. At a minimum, have the system checked at the start of each warm season. The service should include checking the drive belt tension, cleaning the condenser fins, and completing a performance test.

6. Change the AC Filter When Needed

Changing the cabin air filter is an essential part of car air conditioning maintenance. A typical replacement interval is 30,000 miles, but drivers and passengers with airborne allergen sensitivities may need to replace filters more frequently to help prevent dust and pollen from circulating inside the car. Clean cabin filters also allow for stronger airflow and can reduce unpleasant odors. Even car owners with minimal DIY skills can save money and replace the filter themselves by following the instructions in the owner’s manual.

7. Open Windows and Start Driving, Then Turn on Your Air 

Don’t expect the air conditioning to instantly cool the cabin during summer weather when the vehicle interior is blistering hot from sitting in the sun all day. You can give it a head start by opening your car’s windows to flush out hot air when you start the car and turn the blower on high. After a minute or so, close the windows and adjust the AC controls as needed to achieve comfort.

8. Use the Fresh Air Vent When Possible

Recirculation and fresh air buttons interior of carRecirculation and fresh air buttons interior of car

Choosing between recirculating and outside-air mode can be perplexing to some people. Follow this straightforward advice: Use recirculation when outside conditions (smoke, dust, odors, or high humidity) are present. Otherwise, select outside air. Recirculation mode can make the inside air stuffy, and window fogging may occur. Extended use of this mode is not recommended. Instead, use outside-air mode whenever possible.

9. Occasionally Run the AC in Defrost Mode

According to Hardesty, the defrost mode in your car does more than take the frost off your windows. It prevents mildew and clears up moisture inside the AC unit. Doing this once a week for 5 to 10 minutes can help you avoid mold, mildew, or other unpleasant odors in your car.

10. Use Coldest Setting and Adjust the Fan

Most experts agree that setting your air conditioner to the lowest temperature is more efficient for the car’s cooling system and saves fuel. Why? Hardesty says that most cooling systems only cool the cabin by 30 degrees and then stop. If you reach that point and then set the temp higher, you also activate the heater. This dual effort strains the system and consumes more fuel. Instead, set the AC fan to low and rotate the vents away from you.

KBB LogoKBB Logo

KBB Pro Tip: As with many other systems in your car, climate control weakens with wear and tear. Keep an eye out for telltale signs of common and costly issues, keep up with your regular maintenance, and don’t delay addressing any signs of trouble as soon as they arise — it could save you money and grief down the line.


The most common issues that can constitute a visit to a service bay are refrigerant leaks, defective cooling fans, condenser/compressor malfunctions, and mildew in the vents. These services can range from $150 to $2,000, depending on the severity of the problem. Use the Kelley Blue Book Service Advisor tool to get an estimate for AC repair before making an appointment with your repair shop.

Editor’s Note: This article has been updated since its original publication. Joni Finkle contributed to this report.

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Top Tips Learned While Traversing 7,163 Miles of the TransAmerica Trail In A Modified 2025 Subaru Crosstrek https://engineicon.com/top-tips-learned-while-traversing-7163-miles-of-the-transamerica-trail-in-a-modified-2025-subaru-crosstrek/ Wed, 25 Mar 2026 22:29:32 +0000 https://engineicon.com/top-tips-learned-while-traversing-7163-miles-of-the-transamerica-trail-in-a-modified-2025-subaru-crosstrek/ Published:  August 25th, 2025

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Trailer Hitch Installation: 3 Tips https://engineicon.com/trailer-hitch-installation-3-tips/ Tue, 20 Jan 2026 04:58:05 +0000 https://engineicon.com/trailer-hitch-installation-3-tips/

MINI Cooper with Airstream

MINI Cooper with Airstream

More drivers are taking more along with them by installing trailer hitches.  On cars they offer added convenience of towing small trailers or adding bike racks without resorting to awkward roof mounts.  Trailer hitches also open tons of possibilities for work or play when connecting them to RVs, SUVs, trucks and vans.

Like any equipment application, trailer hitches made for your specific vehicle should be reasonably straightforward to install.  There are still plenty of things to consider and follow in the process.  Once you have confirmed the proper setup and capacities with your vehicle owner’s manual, follow these tips for a safe and trouble-free installation.

Proper tools.  Forget what you’ve inferred from infomercials; there is no single substitute for a full set of tools.  Trailer hitch installation is not one of those times to make like MacGyver and get creative.  Have every tool you need at the ready before you begin.  If you don’t have something called for in the instructions, get it.

Follow along.  Just as you’ll want to gather every needed tool beforehand, give the instructions a good read and follow them to the letter.  The trailer hitch may be designed to fit your vehicle, but that doesn’t mean it won’t require preparation or even slight modification.  You might have to adjust the exhaust system a little, so don’t tackle this when the muffler and tailpipe are hot, for example.   

Keep it there.  If your trailer hitch installation doesn’t stay secure, all your work is for nothing.  Prop the hitch or use C-clamps to keep it level and in place during installation.  As you torque the hitch bolts for their final setting, it wouldn’t be a bad idea to use a thread locking adhesive.  Even with lock nuts and washers, it’s an extra measure of assurance.

And when you recheck the bolt torque periodically, clean off built-up dirt and try to spot any bare metal.  Minor scrapes to the trailer hitch are bound to happen even with everyday driving, so with a clean surface, give the scuffs a quick hit of spray paint to give better protection from rust.

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Tips To Help You Choose https://engineicon.com/tips-to-help-you-choose/ Mon, 19 Jan 2026 16:46:18 +0000 https://engineicon.com/tips-to-help-you-choose/

The 2015 Subaru WRX is one of this year’s standout new performance cars. And if you’re considering putting one of these affordable all-wheel-drive sport sedans in your driveway, you have a fundamental choice to make: Do you go with the six-speed manual, or the so-called Lineartronic continuously variable automatic transmission (CVT).

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CVTs tend to be appealing in theory, as they permit infinitely many ratios within a range, allowing engines to be held at the revs where they’re most powerful or economical when accelerating. They’re tempting to automakers as they offer some real advantages in performance and fuel economy numbers. But in execution they can exaggerate noise and vibration issues, and interfere with traditional sensations of sportiness and speed.

Subaru’s CVT is one of the best we’ve driven, and perhaps the best we’ve experienced in a performance-oriented car. And much of it is due to programming and controls—and a strategy that doesn’t surge and ‘motorboat’ but instead feels comfortable when you need it to be, while adding back in some of the benefits of having gears.

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2015 Subaru WRX - Driven

2015 Subaru WRX – Driven

Even considering all that, now that we’ve driven WRX models with both of these transmissions, both at early drive events and then on familiar roads, for us it’s still a no-brainer. Like most driving enthusiasts, we’d choose the manual car, with its nice precise linkage and rather light clutch pedal.

But part of what makes this car so appealing is that with the right set of tires it can just as easily be a four-seasons winter-weather champ. And there are probably plenty of people who want a 268-hp turbocharged, all-wheel-drive sedan that’s quick yet great for the year-round commute.

If you’re still unsure which transmission to choose, click on and take a look at our list of three crucial pros and cons for each.

2015 Subaru WRX  -  shift lever with CVT

2015 Subaru WRX – shift lever with CVT

Here are three good reasons to choose the CVT:

Fakes an eight-speed automatic pretty well. Anyone who gets into the 2015 Subaru WRX can’t afford to miss the steering-wheel buttons that toggle between Intelligent (I), Sport (S), and Sport Sharp (S#). While those modes make some difference to accelerator sensitivity (and how quickly the turbo spools up) whether you get the manual or the CVT, the latter is where they bring a full-on personality change. As well as ’S’ works on the road, it’s a ‘point and shoot’ mode, as we see it, and if you want predictable reproducible behavior for the track or mountain roads, you should click over to S#. Shifts are a little slurred in the lower gears, if you want a quick shift for a hairpin, but as you get into the upper gears it’s downright snappy and could be mistaken for an eight-speed automatic.

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2015 Subaru WRX - drive mode buttons

2015 Subaru WRX – drive mode buttons

Less driveline noise than the manual. We’ve now spent time in manual and CVT versions on some of the same stretches of road and, as in a number of other models that offer a choice between a manual and a CVT (like the Honda Fit, for example), we’ve noticed considerably more noise in the manual vehicle. While some of that might be road noise, there’s definitely less of a direct attachment from the shift knob to the rotating pieces in the transmission, and that keeps CVTs quieter. One other factor is likely that Subaru uses a different all-wheel drive system—one that sends an equal power split to the front and rear wheels through a viscous coupling, while CVT versions have a system using electronically controlled clutches.

2015 Subaru WRX

2015 Subaru WRX

And here are three other good reasons to choose the manual gearbox in the WRX:

Better car control. If you’ve driven a car with a manual transmission—and you know how to drive it—you understand that you’re simply more in touch with the engine and the road. You’re not as detached from the experience, and because of that you might be able to react faster when it matters. With the new-generation, direct-injection turbocharged engine in the 2015 WRX, you don’t need to worry as much about keeping the revs up (as you would in the STI, for instance), but the WRX feels more vivid with the manual—in part because you have the revs exactly where you need them for what happens next. Throws are relatively short and precise, and the clutch pedal is light, so you don’t have to worry as much about fatigue in traffic.

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Stronger launches. If there’s one weak point of CVTs—even the impressive, high-torque Lineartronic unit in the WRX—it’s that launches aren’t all that consistent. Furthermore, the lowest ratio offered in this system is still a bit too tall for this vehicle to come to life the way it should from a standing start. Manual transmissions let you be in control, revving the engine into what zone is best for the conditions, and ‘dumping’ the clutch at the right rate. It takes more experience and driver skill, for sure, but in the manual WRX it makes you feel like a rock star when you do it right.

Engine braking. It’s a common complaint with most automatic transmissions, and those of all types. We felt that, for a performance car, the WRX could use more engine braking, even in Sport Sharp (S#) mode and in one of the lowest gears available. The engine might be humming, but the CVT version feels as if it’s gliding along too easily—even if you pull the left paddle once or twice. In the manual, if you downshift, the car slows down in a more straightforward way.

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