![]() ![]() ![]() I wonder if if there's an substantial difference between sodium benzoate and sebacic acid - they should be in theory compatible, benzoate has been proven by BASF in G-05. The inorganic acid salt is potassium hydroxide - which serves as an alkaline base and could provide an alkaline buffer to keep the pH towards the basic side of things. Sodium benzoate is the same OAT used in Zerex Asian Formula and yet Valvoline/BASF says it's fine for 10/100 service intervals. With the shorter service interval, it means more work for them. I can think of one reason though why Toyota mechanics might like the Red LL over the SLL pink. So unless one just doesn't trust Toyota Motor Corp on SLL pink use, or simply prefers the old shorter service interval Red LL, no reason not to use SLL pink. Otherwise, the Toyota weep hole tsb shown appears to dispel most those anecdotal observation concerns. 'Perhaps' in much older Toyotas, say pre-1996, I might stick with the red out of extreme caution for heater core solder. When they went to SLL pink ingredients indicate they went to sebecic acid/(sebacate) as the OAT inhibitor.Īs noted, Toyota says SLL pink is backward compatible with the Red and can be used in it's place. It confirms LL Red does contain/use organic acid, specifically sodium benzoate as an OAT inhibitor. ![]() That information comes directly off a jug of LL Red and posted when the red LL v pink SLL topic was discussed in 2010, linked. I'm now thinking the red LLC formula doesn't have an organic acid.Įthylene Glycol(107-21-1),Diethylene Glycol(111-46-6) Water() Organic Acid Salt(532-32-1) Hydrated Inorganic Salt(). If you think about it, the longer life of an OAT/xHOAT does help with advertised TCO of a car and sustainability.Īn triazole or similar chemical is used to protect lead solder in an coolant - and the OATs have less of that. While it was the first Toyota product to use a plastic tank radiator, the radiator core and heater core were still lead soldered brass. Someone here said Dex-Cool doesn't play nice with lead solder and while Toyota did say the pink SLLC can be used to service older cars I did notice my hoses turning white and some radiator seepage with the pink stuff on a 1991 Lexus LS400. Highly doubt Toyota switched the core engine metals - but they did phase out lead solder in the mid-2000s, they started to use all aluminum radiators and heater cores. With your knowledge base, did Toyota change internal engine metals in 2002? In other words, why do you think they went from Red to Pink? What is in the post 2002 Toyota engines need the organic acids? Or do they? I'm merely trying to learn. This is the type of information I'm looking for. let me know if you wish."Toyota Super Long Life Coolant” or similar high quality ethylene glycol based non-silicate, nonamine, non-nitrite and non-borate coolant with long-life hybrid organic acid technology I personally don't think it would be wise to use antifreezes made for an all steel engine like your average chevy 350 in any of our aluminum designed engines. it's the other added chemicals that provide extra protection and/or lubrication to other components in the cooling system.įor the most part, I believe the added chemicals to these manufacturer specific antifreezes are specially formualted for these new aluminum engines and heads that there are. Though ethylene glycol is the main ingredient that allows antifreeze to do it's job (diethylene glycol is just a byproduct), it does not really offer any corrosion resistance or rust inhibiting capabilities. Many antifreezes use many different chemicals. Standard green antifreeze uses: ethylene glycol, diethylene glycol, denatonium benzoate ![]() Zerex's dexcool for GMs use: ethylene glycol, diethylene glycol, potassium 2-ethylhexanoate Zerex's G-05 for fords use: ethlyene glycol, diethlyene glycol, sodium benzoate, disodium tetraborate anhydrous. Click to expand.what about the different chemicals? ![]()
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