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Review on Derale 15730 Thermostatic Sandwich Adapter by Andre Pendergrass

Revainrating 4 out of 5

As long as it works well I don't know.

So far so good, I don't know if the 'thermostat' function works or if the adapter is in the 'always open' state. I installed this on a 2009 Toyota Tacoma 4.0L engine. I don't know the exact temperature difference, but it was only added as an additive for engine oil durability.

Pros
  • High quality cast aluminum
Cons
  • Low repairability