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Use Toyota or Aisin radiator fluid and make sure it is the on for YOUR 2015 as Toyota Defined, at 160,000 Kilometers(100,000 miles)most. When you add the cost of distilled water, it's not enough difference for me to bother with mixing it. And last, you need to use distilled water OR buy the premix radiator fluid. There is no need to match the color, and you can mix colors, but you need to use the stuff that is rated for your vehicle (mine is some color between yellow and red right now). Read the label to make sure you get the right kind. And, you can use the non-OEM fluid you can get at an auto parts store or walmart as long as it rated for use in a Toyota. There is absolutely nothing wrong with doing a flush and fill on the radiator fluid, but it is really not needed. You should change the radiator fluid at about 100K. By changing the fluid in the radiator, you are changing 80% of it and that is good enough to restore the anti corrosion capabilities of the fluid. In fact, mechanics just drain the radiator and refill and they don't even mess with the stuff in the engine or heater core. It is not necessary to do a flush and fill with modern coolant. It will get you about 2 mpg better mileage and it is very good oil.Īs for coolant, the long term issue with it is that it becomes acidic. You can get it at Walmart for $23 for 5 quarts. I always use Mobil 1 Advance Fuel Economy. No need to do anything other than change oil and filter every 10K or every year, whichever is first. (And for those out there who say, "don't be a idiot cheap-ass" this is not so much about being cheap, it is more about really understanding where my money is going and spending it on things that are necessary and not just dealer cash-grabs.) Hoping to hear from any honest Toyota Mechanics out in this forum. For some vehicles I have heard they can actually cause harm to the engine. #Toyota super long life coolant toyota nation drivers#For well maintained daily drivers they are not really needed. Random searches in the unreliable internet show that a hot oil flush is really only needed for neglected vehicles, or vehicles that have sat for a long time. I tow my boat (which is light) and our travel trailer (which is about 7,000 lbs). That car ran like brand new the day we sold it. They always pushed the coolant flush, but even when I had the coolant checked at nearly 200,000 km's, the guy said it was in great shape - so clearly it never really would have needed it. Part of why I ask is when I think back to our previous vehicle, a Mazda 5. Is getting a hot oil engine flush and the coolant flush really necessary? That said, I don't want to spend money where I don't have to. Sorry that this displays with so much waste space - couldn't be compacted more, apparently du to forum formatting requirements.I am not one to shy away from paying for something that is important to help my truck last forever. Perhaps a RAV4 owner who is a chemist could determine whether this is a correct or incorrect assumption. This technology provides superior protection to all components of the cooling system including those exotic materials like aluminum and magnesium found in the modern day engine."Īccording to the article Toyota coolant and Chevron Dex-Cool would appear to be based upon the same technology. OATs are Long Life Coolants (LLC), based on minimally depleting Carboxylate Technology. "OAT is an acronym for Organic Acid (Additive) Technology which describes the type of materials responsible for the corrosion protection offered by a coolant of this type. From an article by Reochem, Inc., Coolant Experts: #Toyota super long life coolant toyota nation manual#The Toyota RAV4 Owner's Manual says that coolant used should be either Toyota Super Long Life Coolant, or "Similar high quality ethylene glycol-based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology." Chevron Dex-Cool coolant employs the same labeling and uses the word "carboxylate" in its technical data description, rather than "organic acid," which Toyota uses. ![]()
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