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Get a turbo blanket. This is scientifically proved to improve performance, and control the damage cause from heat.
BMW engineered this coolant t stat, and oil t stat for a reason. And I can guarantee they have performed more testing than any of these manufacturers selling lower temp t stats.
Only use Genuine parts on a vehicle like this. Unless your planning to track your x5 M, and have it professionally tuned by Nick Pavloski I would stick to what the manufacturer specifications. (Dinan is the only trusted company for aftermarket parts, and engine mapping.)
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