It is a common misconception that turbo blankets shorten the life of turbos. In fact, turbo blankets actually help to extend the life of turbos by protecting them from excessive heat.
Turbochargers are designed to operate within a certain temperature range in order to function properly and efficiently. When turbos are exposed to excessively high temperatures, they can start to break down and wear out prematurely. This is where turbo blankets come in - by insulating the turbo and keeping temperatures under control, turbo blankets help to prolong the life of turbos.
So, while it may seem counterintuitive, using a turbo blanket can actually help to extend the life of your turbocharger - not shorten it!