My Plus Six has radiator caps with the pressure indicated as 15 psi; yesterday at MMC I saw a BMW B58 engine with radiator caps (shown in the photo) which appear to be twice that pressure. Increased pressure means an increased boiling point, but also a potential stress test for any leaks on the cooling system. Is there any merit in switching from what I have to the ones MMC now seem to use?

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Plus Six "Rachel"
Volvo C40