I notice that after a couple of heat cycles on a new engeine, the pan bolts tend to loosen and need to be retorqued.
That is the result of a soft gasket used to compensate for very irregular surfaces and is generally inexpensive. It will not retain bolt torque. Also tends to "wick" oil through the gasket causing external dampness that dust and dirt likes to cling to.
Put the #2585 pan gasket on my Charger Mule about 5 years ago. Bolts are still tight and no weeping through the gasket.
