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Anti Freeze information

I picked up the information below from the newsletter from the SW Florida Thunderbird club. CTCI's Authenticity Chairman also suggests this website for anti freeze information: www.no-rosion.com

    Antifreeze manufacturers have formulated their long life products so that the inhibitor attracts, among other things, silicone compounds-the most commonly used base for gasket sealants. It also attacks lead-based products (solder, Bab-bitt), some yellow metals (cambearings, radiators) and conventional gaskets and packing materials. The warning here is to NOT use coolants with OAT– inhibitors in your antique car! You need to read the label and use only IAT (inorganic Additive Technology) Inhibited antifreeze.
    OAT stands for “Organic Acid Technology” based corrosion-inhibitors, and they are designed to have longer service life than that of IAT coolants; but unfortunately that feature comes with a bad side effect to older cars. One fellow decided to change antifreeze in his antique car. His regular brand was out of stock so he brought the “advanced” formula. Four weeks later he found pools of antifreeze under his car. The antifreeze had dissolved the old gaskets. It was formulated with OAT–inhibitors.
    Tips for finding IAT coolant are as follows:
1. Prestone says that all of their current antifreezes are OAT formulas.

2. Peak says that their Peak Antifreeze and Coolant is an IAT formula. The container is blue. It is important that it DOES NOT say “long life”. Peak Sierra brand is propylene glycol for those who prefer that. It too uses an IAT formula.

3. Zerex says that Zerex Original Green is an IAT formula. It comes in a white container. Do not use their G-05 formula in the gold jug.
(This was first published in Jim Crame’s W. Michigan Buick Chapter News Letter.)

Editor note:
    After reading the above article, I became concerned as I had the used the Prestone antifreeze in my ’57 for the past few years. The Prestone bottle had the statement “Prestone antifreeze coolant is intended for all passenger vehicles and light trucks”. However after a trip to the local Auto Parts Store, I noticed the Peak bottle had an explanation stating “For use in Ford and Chrysler 2000 & earlier - GM 1995 & earlier - All MAKES & MODELS: 1989 AND EARLIER .
    I showed the above article to some auto technicians and some people behind the counter of a couple of Auto Parts stores. No one could give me an answer as to the truth in the article. I never had a problem with the Prestone; but just to be on the safe side, I drained out the Prestone antifreeze and used the Peak instead. The wording on the bottle indicated to me that maybe the Peak would be better for older cars. As always, it is your decision as to what to use in your car.
Dave Tulowitzky

    As Dave said I've been using Prestone for years. I'll probably change the next time I drain the radiator.
John


  • Home
  • Our Story
    • News & Announcements
    • Cliff Noxon Service Award
  • Past Events
    • 2011 >
      • Allure of the Automobile
      • Great Oregon Steam Up
      • Carousel Trip
      • Veterans Dinner
      • Christmas Luncheon
    • 2012 >
      • 2012 Kick-Off Luncheon
      • Superior Glass
      • June 2012 Picnic
      • CTCI - Memphis
      • Gorge Tour
    • 2013 >
      • 2013 Kick-Off Luncheon
      • President's Day 2013
      • Guide Dog Graduation
      • SMS Auto Fabrics
      • July BBQ
      • August Rally
      • September Business Meeting
      • Oct Covered Bridge Tour
    • 2014 >
      • 2014 Kick-Off Luncheon
      • Feb Dessert Auction
      • 2014 40th Birthday party
      • May Tech Session
      • July Rally
      • August Progressive Dinner
    • 2015 >
      • 2015 Kick-Off Luncheo
      • March Tour of Ken Austin collection
      • April Air National Guard Tour
      • May PT Boat Tour
      • July Rally
      • August Gorge Tour
      • August CTCI Convention in Albuquerque
      • Sept Carlton Crush
      • Oct Tour & Lunch
    • 2016 >
      • Feb 2016 Valentine Party
      • March - World of Speed
      • May 2016 - John Lemmon's car collection
      • June 2016 - Timberline
      • July 2016 - Rally
      • September 2016
      • Oct 2016 - Model Railroad
      • NOV 2016
    • 2017 >
      • Jan 2017
      • Feb 2017
      • March 2017
      • April 2017
      • May 2017
      • June 2017
      • July 2017
      • Sept 2017
      • Oct 2017
    • 2018 >
      • Jan Kick-Off Dinner
      • Feb 2018
      • March 2018 Freedman Collection
      • April 2018 Tech Session
      • May 2018 WAAM & LeMay
      • June 2018
      • August 2018
      • October 2018
      • November 2018
      • December 2018
    • 2019 >
      • January 2019
      • Feb 2019 Albany Carousel
      • March 2019 Ken Austin Tour
      • April 2019
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      • Dec 2022
    • 2023 >
      • Jan 2023
  • Up Coming Events
  • Photos
    • As seen at a local Cruise-In
    • Prisoners of Time
    • 1962 Budd XT Bird
    • 1961 Buick Flamingo
    • 1916 Gas Prices
    • Ford History Video
    • Consumer Reports
    • Fords of the 1950's
    • 57-58 Thunderbird
    • Driving to Wichita 2006
    • Circus Party at 2008 International Convention
    • Working on members' cars
    • 1957 Rebuild
  • Contact Us
  • Join Us
  • Tech Tips
    • Preparing for winter storage
    • Cooling System >
      • Anti Freeze information
      • Plugged Overflow Tube
      • Radiator Caps
      • Temp Sender Bushing Removal
      • Cooling Trick
    • Electrical >
      • Battery Safety
      • Ground Strap
      • Safety Circuit Breaker
      • Turn Signal Switch
      • Fuel & Temp Gauge Safety
      • Electrical Leaks
    • Slide Shows >
      • Engine Install slide show
      • Body Removal Slide Show
      • Another Engine Install
    • Cleaning Tips
    • Valve Adjust tip
    • 1955 Shop Manual error
    • Turning Rotors
    • Welding around Brake Cleaner
    • Paint on Chrome
    • Wind Wing Glass Removal
    • Automatic Transmission Removal
    • Arm Protection
    • Changing the Fuel Pump
    • Rusty Lug Nuts
    • Local Parts availability
  • Club Store
  • Bird Watcher
    • 2014 >
      • Sept 2014
  • Cruise-Ins
  • Auto Service Recommendations