August Newsletter
Go to the RockAuto Catalog

Another Happy Customer!

I am not a mechanic but was able to find exactly what I needed and was confident about my choice. Then it showed up super fast and was exactly what was promised.

Jeff in Maine

Upcoming Events

Need goody bag items and a gift certificate for your show? RockAuto can help! Email for more information.

31 Hangtown Evening Car Show
Placerville, CA Email
1 15th Annual TX3S Gathering
Dallas, TX Email
1 4th Annual Downtown Oxford First Friday Car Show
Oxford, PA Email
2 Roar by The Shore
Mentor on the Lake, OH Email
2 Chinquipin Off Road Park - Benefit Raffle & Poker Run
Sneedville, TN Email
3 4th Annual Leave Cystic Fibrosis In Our Dust Car Show
Bethlehem, PA Email
3 14th Annual Cruisin at the Castle
Stanwood, MI Email
3 5th Annual Cars for the Cure - Drive to End Diabetes
McLean, VA Email
3 Third Annual Itty Bitty Kitty Car & Motorcycle Show
Charleston, WV Email
4 Merrill Lions 39th Annual Car Show
Merrill, WI Email
7 Lamar Stephens Memorial Car, Truck & Motorcycle Show
Buford, GA Email
7 Datsun Roadsters at the Glen
Watkins Glen, NY Email
7 Hooptie Do for Heart Disease (HD4HD)
Mobile, AL Email
8 Wadsworth Props & Pistons Festival
Akron Ohio, OH Email
8 Blazer Bash
Moab, UT Email
9 Mopars for the Military Charity Car Show
Mohnton City, PA Email
9 Pickups N Panels 18th Annual Shootout
Farmers Branch, TX Email
9 Top Flight Corvette Club All Car Show
Fort Washington, MD Email
9 North Country Hillbillys Car & Truck Show
Braham, MN Email
10 Cruise in for CHCHA
Cynthiana, KY Email
10 36th Annual Havelock Car Show
Lincoln, NE Email
14 Fall Ford Festival
Townsend, TN Email
14 Carsino Night
Fridley, MN Email
14 Cincinnati VW/Porsche Annual Reunion
Cincinnati, OH Email
15 Nor'Wester Rally
Lewiston, ID Email
15 Back to School Run 2017
Granby, MA Email
15 Dash to the Dells 28
Wisconsin Dells, WI Email
15 Historic Saltsburg Car Cruise
Saltsburg, PA Email
ACDelco Cabin Air Filter Retrofit Kits
ACDelco Cabin Air Filter Retrofit Kits
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 Control Arm and Ball Joint Rebate

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

Through September 30, 2017, 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.

Forum of the Month
Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

At 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

Repair Mistakes & Blunders
Repair  Mistakes & Blunders

In the summer of 1981, two friends and I were recent high school graduates who worked evenings and weekends at a two-bay, full-service gas station (Standard Oil, remember them?). It was fun! I grew up a car guy by watching my dad and his friends and I had my own 1970 Mustang project car/daily driver. What a great time. It was almost heaven!

One warm evening, approaching closing time at 10 PM, a distraught woman in an early '70s Japanese mini-pickup pulled into the station complaining her truck was overheating. Wanting to impress my friends with my advanced automotive knowledge - and help a lady in distress - I offered to pull it into the shop and do a flush/fill of the cooling system. She agreed, and I was all set to showcase my skills.

I hooked up a water hose to what I thought was the heater hose and turned on the water. But nothing came out the top of the radiator. Hmmm... So I turned up the water some more, still nothing. Uh oh, something is wrong! My showing off is not going as planned.

A few seconds later, the mysterious hose I had attached the water hose to flew out from underneath the hood, and a stream of energetic water dang near hit the ceiling before gracefully curling back onto the floor. It was just like the fountain in the city park. Boy, did I blow it! I attached the water supply to the PCV hose, not a heater/coolant hose, thus filling the engine with water!

In the end, the truck was OK though. I had my father come help me fix it. We put the truck on the lift, drained and washed out the engine block and oil pan, filled it with oil and it started right up. It made a little steam for a bit, but it seemed none the worse for wear...

Needless to say, I was fired the next day. But in the end, lesson learned, and I can smile about that blunder today.

Chris in Colorado

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 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!

Automotive Trivia
Automotive Trivia
Mitsubishi logo
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

High Compression Engines Are Back!
Tom's Story

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?

71 Ford LTD and a decal on the air cleaner specify 91 (RON) regular gasoline

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,

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

Russel's 1988 Toyota Celica Convertible
Russel's 1988 Toyota Celica Convertible

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 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.

Automotive Trivia Answer
Automotive Trivia
Mitsubishi logo
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

Back up to trivia question