why ferrari does not recommend Dex-cool silicate free coolant for ferrari cars, corrosioin free, long life, excellent for aluminum parts. If one of the reasons we should change the conventional coolant more often is for inhibitors, so dex-cool is the way to go for better protection. The only problem with dex-cool is you should not have trapped air since it will cause corrosion, otherwise it is a superior to the rest. It is not the isue of what color or what brand, GM invented this antifreeze, dont you think it is the best for alumunim parts. If you have a reason please explain it to me. Thanks.