This can cause corrosive protection loss. However, I do not recommend mixing the different types of coolant even though they are miscible. ZEREX G-40 chemistry will not void vehicle manufacturer warranty. Hence, you can mix this coolant with the earlier G12, G12+, and G12++. ZEREX G-40 is a premium grade, long-life coolant that employs nitrite, amine and phosphate-free, Si-organic acid technology (Si-OAT) to protect the cooling system from rust and corrosion. Prestone ® Antifreeze+Coolant prevents this corrosion and buildup, which keeps fluid flowing appropriately and heat transfer optimal throughout the system. The latest updated version G13 specs are compatible with the old ones that VW used previously. Buildup in the cooling hoses can cause major problems such as slowing coolant flow, reducing cooling and even clogs in the system from loose corrosion.Heat can only be effectively transferred with a liquid in the system, so it’s crucial to keep your coolant from freezing or evaporating. However, it does not contain glycerin, which is the selling point of the G13 coolant. The primary purpose of coolant is transferring heat and preventing engine damage caused by freezing or boiling. G12++ is compatible with all VW radiators, and it delivers superb cooling and antifreeze performance.Dex-Cool: Run away from anything that has Dex-Cool on the label. A very brief description of each coolant starting from left to right. the silicate beads flow through the cooling. located in the right side of the expansion tank. What that means is that there is a Nylon/plastic mesh bag filled with silicate beads. Not all NAPA stores stock all the varieties of Zerex coolant. VW and Audis that use G13 coolant have a 'mit silikate' printed on the expansion tank. G12+ is compatible with VW and Audi models, where G11 or G12 are the OEM-recommended coolants. The Pentosin G13 coolant is available thru NAPA, Your local store may have to order it in from warehouse.If you own a VW from 1994 – 1999, this item is not an ideal pick to use in place of G12. Since it contains silicates, it is not recommended for older radiators made from copper or brass. G-05 has some remaining in the formula, while the Prestone Universal has none (similar to the Dexcool formula). Glycerin is poised to be more eco-friendly than glycol. That being said, and peva might be able to field your question better, the primary difference between the Prestone Univeral 5/150 and the G-05 is the level of silicates. Moreover, the coolant is made with glycerin, a by-product of mineral oil. It is tested to have the same cooling and antifreeze performance as the G12++ coolant. This antifreeze has a purple/violet color. More so, these silicate additives are the reason why the G13 coolant is ideal for long-term use on modern radiators (primarily those made with magnesium alloy, aluminum, or cast iron). Valvoline Zerex G-05 Antifreeze/Coolant The Valvoline Zerex G-05 is a concentrated formula, meaning that the gallon provided will last you for 2 gallons of total coolant liquid. This more recent coolant is formulated with silicate additives for maximum aluminum protection. The introduction of the G13 discontinued the G12 series.
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