G-05 contains silicates and no phosphates; it is not a suitable coolant replacement in Japanese vehicles where the manufacturer specifically recommends either a silicate-free coolant or a phosphated coolant. Most recommend both because the proprietary coolant formulas from the dominant Japanese coolant company, CCI, rely on silicate-free, phosphated organic acid technology (P-OAT).
Peak "long life" (Global Lifetime, Long Life, Extended Life) coolants are not appropriate for most Japanese vehicles because they contain no phosphates (according to Peak advertising). The issue regarding 2-EHA in Peak "long life" coolants other than Peak Global Lifetime (which Peak advertises as 2-EHA free) is murky. Some Peak technical consultants have been quoted on some boards (including this one) as admitting that Peak Long Life coolant contains 2-EHA but Peak has never published any statement in print on the web to my knowledge affirming this. Moreover, Peak technical consultants are also quoted in online boards issuing blatantly false misinformation such as the assertion that Mazda FL-22 coolant (Mazda's version of CCI's second generation P-OAT coolant) is merely a relabeled Motorcraft product. This assertion was made long before Ford introduced Motorcraft Specialty Green Engine Coolant, a P-OAT coolant similar to Mazda FL-22, as the factory fill for engines jointly developed with Mazda. Prior to 2009 (see
http://www.fcsdchemicalsandlubricants.com/Main/quickref/scuc.pdf), Ford used G-05 (Motorcraft Premium Gold Engine Coolant) as the factory fill in Ford-Mazda engines. Mazda introduced FL-22 in 2005, replacing a first generation P-OAT coolant which was the factory fill in my 2003 Mazda MPV.
Evidently Ford determined that FL-22 was superior to G-05 in Ford/Mazda engines relying on Japanese technology.
For the record, I have never seen a bottle of Peak Long Life or Extended Life coolant that specifically lists 2-EHA on the label. I am not saying that they don't exist but merely that every time I have checked they list nothing specific about the additive package other than sodium benzoate or NJTSRN QT1 which is a NJ registered name for a proprietary Peak "long-life" coolant package.
At any rate, neither G-05 nor ANY Peak coolant is suitable for use in most Japanese vehicles because they do not contain phosphates. G-05 is a particularly bad match to Japanese vehicles because it contains silicates. The only replacements that meet the requirements of Japanese auto manufacturers are factory coolants, Valvoline Zerex® Asian Vehicle Anitfreeze/Coolant, and Motorcraft Specialty Green Engine Coolant--which, as far as I know, are the only P-OAT coolants available in the US market.