Car Doctor: What’s with these on-line adverts for gas-saving devices?

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John Paul, AAA Northeast’s Car Doctor, hears from a reader who’s seeing on-line adverts for gasoline savers.

Q. Gas is pricey, and I maintain getting Facebook adverts for gas-saving tablets, air filters, magnets, and even plug-in pc system programmers. Do any of those work?

A. None that I’ve ever seen or tried. None of the claims can normally be verified. They all appear to be invented by some unnamed NASA scientist, and in the event that they did work, wouldn’t a automobile producer use them? If you need to get monetary savings on gasoline, go simple on the gasoline and brake, drive the velocity restrict, and mix journeys to be extra environment friendly.

Q. I personal a 2022 Volkswagen Atlas with about 79,000 miles. The difficulty is that the driving force’s-side AC vent sporadically blows very heat air as an alternative of chilly air. I took it to the seller, and so they couldn’t discover something improper. Do you might have any concepts what could be inflicting this?

A. There is a left and proper vent temperature sensor that gives info to the HVAC management module, which then controls the mix doorways. I imagine the one technique to check for a difficulty is to catch the sensor studying when the vent is heat to see what the studying is and whether or not the system is commanding the temperature mix door to open or shut. As a DIY analysis, when it does it once more, change the temperature setting (go up and down) and see if the vent returns to chill air. If it does, the difficulty is among the sensors, the mix door, or some kind of calibration difficulty. If it doesn’t, it could be that the system is low on refrigerant. Although I’ve not seen this on this mannequin, I’ve seen it on different makes and fashions the place the cost is low and the air popping out of the vents has a unique temperature backward and forward.

Q. I’m pondering of shopping for a 2026 BMW 330i. The base mannequin comes with customary tires on 18-inch wheels, however very quickly after selecting just a few choices or colours, you wind up having to get run-flat tires on 19-inch wheels. I’ve heard prior to now that run-flat tires lead to a harsher experience. Is this nonetheless true? Have they improved the way in which they carry out? I do know they’re costlier to exchange however am contemplating them as a security measure to keep away from altering a flat on the improper time and place.

A. Run-flat tires have improved dramatically over time, however the experience remains to be a bit harsher than that of typical tires. I lately spent every week in a 550e with run-flats, and the experience was agency however not uncomfortable. In this case, I used to be in Florida, the place the roads are usually smoother than the place I’m now within the Northeast. The different difficulty with run-flats is a considerably shorter life and the next substitute value. As an instance, wanting on-line, 18-inch Michelin tires are about $225 every, whereas 19-inch Michelin run-flats are about $400 every. This is one thing to bear in mind, relying on how lengthy you retain your automobiles.

Q. I’ve a 2002 Honda Accord with 90,000 miles and simply realized it has a timing belt. When does it want altering? I referred to as my native store, and so they gave me an estimate of $1,000 to $1,200 for the timing belt and water pump. I reside within the metropolis, and the automotive has loads of dents and dings however runs nicely. Should I put the cash into the automotive?

A. Even although the mileage is comparatively low, the belt is way past its age restrict and must be changed as quickly as sensible. At 24 years outdated, if the automotive is structurally sound and protected, for my part it’s a good funding. Also, there’s something good a couple of automotive that you simply don’t want to fret about each little door ding and bumper scuff.

Q. I’ve a 2013 Nissan Rogue, and it wants entrance brakes. How a lot would you cost at your store?

A. The Car Doctor restore store is digital. I’m right here (not AI, as some readers have guessed) to assist folks with automotive issues. I like to consider my solutions as a second opinion from a trusted buddy or relative. The typical value for entrance brakes, together with rotors — which is typical given the automobile’s age — is about $550 utilizing manufacturing unit unique gear elements. There are high quality aftermarket elements obtainable, however be cautious of very low-cost elements. I lately spoke with somebody who changed their entrance brakes and rotors with on-line elements. The complete value of two rotors and a brake pad package was $40. One month later, they have been changing the brakes once more as a result of vibration and noise.

Q. I’ve seen you suggest Techron gasoline system cleaner prior to now. Two questions, and please don’t take any offense to the second query. Would Techron be an excellent product for my new Hyundai Tucson, and do firms pay you to endorse their merchandise?

A. Techron is an effective product and has been round eternally. In reality, Hyundai recommends a gasoline additive each 30,000 miles. Hyundai has beneficial gasoline components equipped by Chevron, the maker of Techron, for sure autos and repair schedules. I’ve by no means acquired cost for merchandise I point out. From time to time, firms will ship a assessment pattern. If it’s good, I’ll point out it. If not, I’ll let readers know that as nicely.

John Paul is AAA Northeast’s Car Doctor. He has over 40 years of expertise within the automotive enterprise and is an ASE-certified grasp technician. E-mail your Car Doctor query to [email protected]. Listen to the Car Doctor Podcast on Apple Podcasts or different widespread podcast websites.