Kits include easy to follow instructions

Cabin Air Filters prevent pollutants from entering the interior or dirtying the ducts, doors, fan, sensors and other inner-workings of the Heat & Air Conditioning system. Most vehicles built in the last 10+ years came equipped with Cabin Air Filters, but some 2007-2014 GM trucks (Chevrolet, GMC, Cadillac) did not have them installed at the factory. If you drive a 2007-2014 Silverado, Tahoe, Suburban, Avalanche, Sierra, Yukon or Escalade, it may not have a Cabin Air Filter. Fortunately, RockAuto has ACDelco Cabin Air Filter Retrofit Kits for those trucks!

RockAuto offers two variations of the kit - either the standard kit with a particulate filter (filters pollutants) or the premium kit with a carbon filter (filters pollutants and odors). In addition to the filter, each kit contains a filter cover and detailed installation instructions. The Cabin Air Filter Retrofit Kits for GM trucks are located in the "Heat & Air Conditioning" category of the RockAuto catalog.

Also check the "Heat & Air Conditioning" category to see if an older car is equipped with a Cabin Air Filter. If it has been a year or more since the Cabin Air Filter was replaced, you could experience a dramatic improvement in interior air quality and/or AC performance after installing a new filter. RockAuto has particulate and carbon Cabin Air Filters from top-name manufacturers at reliably low prices.

ÜRO Parts is a leading manufacturer of replacement parts for BMW, Jaguar, Land Rover, Mercedes, MG, Mini, Porsche, Saab, Volvo, Triumph and more. RockAuto.com offers ÜRO Parts made to OE specifications without the expensive dealership prices.

Through September 30, 2017, RockAuto.com customers can take advantage of an exclusive, instant 10% rebate on select ÜRO Parts control arms and ball joints. Parts included in the instant manufacturer rebate are marked with a in the RockAuto catalog.

At Zilvia.net you will find dedicated and knowledgeable Nissan 240SX (Silvia) and Z (Fairlady) owners. Topics covered include technical articles, reviews, installation tips, motorsport information, local/regional/international specific topics and even Nissan related news.

If you are the administrator or member of a forum and you would like to see your website featured in an upcoming newsletter and receive a discount code to share with your members, contact megant@rockauto.com

Tell us about your most infamous auto repair blunder or unconventional fix. Use your woe to help others avoid similar mistakes or share off-the-wall solutions that worked (at least for a while!). Please email your story to flamur@rockauto.com. Include your mailing address and if you would like a RockAuto T-Shirt (please let us know your shirt size) or Hat if we publish your story. See the T-Shirts and Hats under Tools & Universal Parts in the catalog. The story will be credited using only your first name and your vague geographic location (state, province, country, continent, etc.) so you can remain semi-anonymous!

Mitsubishi logo

What does the Mitsubishi logo represent?

A. Yataro Iwasaki, Mitsubishi's founder, picked a logo similar to the three leaf crest of the Tosa Clan, Yataro's first employer.
B. The three stacked rhombuses in the family crest of Mitsubishi's founder.
C. Three water chestnuts.
D. All of the above.

Answer below

Legendary muscle car engines of the late '60s such as the Chevy 427, Chrysler 426 Hemi and Ford 428 Cobra Jet have compression ratios of at least 11:1. Gasoline is more likely to explode as compression (and heat) increase. Knock, pre-ignition and detonation are all words to describe the bad things that happen if the gasoline in a cylinder explodes before being ignited by the spark plug. It takes more compression and heat to explode higher octane gasoline. The high compression engines of the '60s were designed to run on 100+ octane gasoline to avoid damaging pre-ignition.

High compression engines are back! The 1.6L in the KIA Soul, 2.0L in the Ford Focus, 2.4L in the Buick Regal and many other modern engines have compression ratios of at least 11:1. Should I hunt all over town for 100+ octane gas or buy bottles of octane booster the next time I rent a Focus? No, the Focus just needs regular gas. Gasoline direct injection (GDI) makes this possible.

With a conventional carbureted or fuel injected engine, gasoline meanders at relatively low pressure (75 psi (500 kPa) or less) into the cylinders whenever the intake valves open. The spark plug will not fire until enough time has passed to allow the correct amount of gasoline and air to arrive. That brief moment of time is when pre-ignition of the gasoline can occur in a high compression engine.

A GDI engine typically injects gasoline at around 3,000 psi (21,000 kPa) directly into the cylinders. At that pressure, all the gasoline can be delivered into the cylinder at the precise moment the spark plug fires. There is almost no time for pre-ignition to occur. Compression, heat and the spark plug's spark may work simultaneously to ignite the gasoline at the correct time.

Buy gasoline with the octane recommended in the vehicle's Owners Manual (under "Literature" in the RockAuto catalog). Regular gasoline is recommended for most GDI engines, and it is simply a waste of money to pay more for premium gas.

The octane required for a '60s era engine may not be as high as the Owners Manual first makes it seem. The Owners Manual for my '71 Ford LTD and a decal on the air cleaner specify 91 (RON) "regular" gasoline. 91 octane is premium fuel at the gas station, not regular. What octane fuel does my old Ford need?

RON stands for Research Octane Number. The "Motor Method" is another system for measuring gasoline octane. The octane number posted on most gasoline pumps is the average of the RON and Motor Method numbers and is typically four points less than the RON number. The 91 (RON) gas called for in my Owners Manual is the same as the 87 octane regular at the gas station.

Tom Taylor,
RockAuto.com

To read more of Tom's articles, click this link and choose from story titles on the Newsletter Archives page.

I bought this 1988 Celica Convertible six years ago from a Toyota mechanic. Although he took excellent care of the car, it still needed some attention to details and replacement of some original parts. I have upgraded the suspension, brakes, lighting and electronic fuel system, as well as front glass, all with OE parts easily available from RockAuto, at a fraction of the cost the local part stores offer.

With help from RockAuto, I am hoping to do another 30 years with this sweet summer ride!

Russel in Canada

Share Your Hard Work
Do you purchase parts from RockAuto? If so, RockAuto would like to give you the opportunity to have your car or truck possibly featured in one (or occasionally more) of our publications such as the monthly newsletter, collector magnets or RockAuto social media. New, old, import, domestic, daily driver, trailer queen, classic, antique, we want to see them all! Please email flamur@rockauto.com with your vehicle's history, interesting details, your favorite images (tips for taking pictures of your car) and what parts from RockAuto you have used.

Mitsubishi logo

What does the Mitsubishi logo represent?

A. Yataro Iwasaki, Mitsubishi's founder, picked a logo similar to the three leaf crest of the Tosa Clan, Yataro's first employer.
B. The three stacked rhombuses in the family crest of Mitsubishi's founder.
C. Three water chestnuts.
Answer: D. All of the above. (Yataro Iwasaki picked a logo to represent the two family crests. The Japanese public thought the logo looked more like three water chestnuts. "Three water chestnuts" translates to "Mitsubishi" in Japanese!) source

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