If he was talking about the shield, then yes, he is right. If he was talking about the snorkel he was full of shite. The airbox draws the same air from the wheel well if the snorkel is on or off.Today I visited Mopar and asked the engineer. He told me the reason for its presence is to suction the cold air, and if I removed it, the bulb would draw hot air, and this affects the performance.
That should have had ZERO effect on anything other than a bit more sound from the intake when you step on it, I do not see how it could have affected your oil temps... was it a lot hotter outside today than it has been previously?I did not remove the shield i just remove the air duct