Pentosin’s Pentofrost SF was mentioned several times in my research and unlike our other recommendations, this comes as a full strength antifreeze concentrate so you’ll have to dilute it with a 50/50 mixture of distilled water. In my research, I came across dozens of posts with Porsche owners who recommended this coolant, saying it’s a cost-effective alternative than buying genuine Porsche coolant from the dealership. If you install it as part of a complete flush and fill - which you should - PEAK will guarantee the coolant to provide service life protection up to 150,000 miles or 5 years.Īccording to PEAK, this coolant will protect from -34☏ to 265☏. Like our top pick, this coolant is prediluted and ready to go. If your vehicle doesn’t land in that list, make sure to check out the other PEAK OET coolants that are available. The Violet version is designed for European vehicles that require a silicate-enhanced organic acid technology (Si-OAT) formula and covers 2007-up Audi, 2014-up Mercedes-Benz, 2009-up Porsche, and 2008-up Volkswagen. It comes in different applications that work with a wide variety of vehicles, so find the right one for your specific car.Īnother popular favorite among Porsche owners is this Violet 50/50 prediluted coolant from PEAK’s Original Equipment Technology (OET) lineup. If you happened to come across this post and you don’t own a Porsche, Zerex is still our recommendation for the best coolant. Valvoline says this coolant will provide protection for 5 years / 150,000 miles in light duty applications, or 3 years / 300,000 miles in heavy duty applications. It uses a premium Si-organic acid technology formula for long-life protection and it meets several industry specifications: ASTM D3306, ASTM D4985, ASTM 6210, Federal Specification A-A-870A, SAE J1034, J814, and J1941. It’s a phosphate- and nitrate-free formula, an important factor when shopping for Porsche coolant.Īs its name suggests, this coolant is designed for European vehicles requiring genuine G40 or G12++ coolant. This 50/50 prediluted antifreeze is coolant that’s ready to be used in your Porsche or other vehicles from German automakers Audi, Mercedes-Benz, and Volkswagen. Throughout my research, I found many Porsche owners who recommend Zerex G40 by Valvoline. The products seen on this list all come highly recommended from Porsche enthusiasts, some who have used these products in their vehicles for over 150,000 miles. So how do we go about deciding the best antifreezes and coolants? Our top choices come from a mix of personal experience and scouring the internet and forums for advice from actual Porsche owners and experts. But unfortunately we don’t live in that world and conducting a simulation like that is impossible. If we lived in a world where we could have ideal testing conditions - using our top recommendations in different instances of the same vehicle with the same conditions for 100,000 miles, for example - we might be surprised by the results. It is really debatable if there is a significant or even noticeable difference between quality coolants and antifreezes. Learn MoreĬoolant is a bit like engine oil, in that most car owners have their personal favorite. FlatSixes and its partners may earn a commission if you purchase a product through one of our links.
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