$39 for Vehicle Emissions Test with Tire Pressure Check from Smog Frog ($81.75 Value)

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104 Ratings

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$81.75 52% $42.75
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In a Nutshell

Technicians clear cars for street-legal use with emissions testing, and ensure safety with tire pressure checks

The Fine Print

Promotional value expires 360 days after purchase. Amount paid never expires. May be repurchased every 90 days. Limit 1 per person, may buy 1 additional as gift. Does not include $8.25 certification fee per the State of California. An additional fee applies for cars that are older than 1996 and for RVs and other large vehicles. Appointment recommended. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

The Deal

  • $39 for One vehicle emissions test with tire pressure check ($81.75 value)

Tire Pressure: Inflating Your Car’s Efficiency 

To learn more about why the included tire-pressure check is so important—and why a pro can enhance even this simple task—read on.

There are many things that you need to do regularly to keep a vehicle running smoothly—change the oil, check the fluids, and occasionally open a garage door instead of just plowing through it. Tire pressure can be the easiest of these tasks to overlook: it takes a lot of extra pressure to damage a tire, and only a seriously under-filled tire will look visibly flat. 

The small range in the middle can make a substantial difference in performance, though. The Department of Energy estimates that properly inflated tires can boost fuel economy by about 3%, largely because underinflated tires create extra drag. That doesn’t mean that going overboard with the air pump will increase the benefits—pressure that is too high means less tire surface in contact with the street, making the vehicle less stable and harder to handle. 

Some manufacturers are beginning to craft tires with built-in RFID chips that help track and regulate tire pressure. For now, though, most drivers still have to find the optimal tire pressure in their owner’s manual or on a sticker that may be found in the doorjamb or glove box. (The number printed on the sidewall of the tire is simply a maximum beyond which the vehicle is unsafe, and shouldn’t be used as a guideline.) That number will often be different for each wheel, since weight is distributed differently across the frame of a car. 

Professional mechanics have access to digital pressure gauges and a database of proper inflation levels, which help vehicles run safely and efficiently when you’re on long road trips or entertaining a child by driving through a car wash all day. Pros will also be able to better take into account another quirk of calculating tire pressure: manufacturers’ recommended pressure levels assume that the tire is “cold,” meaning that it hasn’t been driven on in at least three hours. So if you’ve recently been on the road, you’ll need to factor in the extra pressure that builds up from the heating and expansion of the air inside a tire in motion.

Customer Reviews

104 Ratings

I was easily able to schedule an appointment the very next day. The woman working was kind an courteous and the work was performed in a quick and efficient manner.
Casi J. · May 4, 2016
Friendly and good service.
Ken N. · April 30, 2016
Quick and easy!
Laurin E. · April 17, 2016
Merchant Location Map
  1. 1

    Santa Rosa

    2799 Yulupa Avenue

    Santa Rosa, CA 95405

    +17075755051

    Get Directions
  2. 2

    Rohnert Park

    175 Southwest Boulevard

    Rohnert Park, CA 94928

    +17078887732

    Get Directions

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