Fleet truck. 2011 1/2 ton with 5.7 hemi. >220,000 mi. Desert driving conditions with lots of dirt roads. 3000 mi OCI with a quality oil and filter air filter changed as well every 3000 mi. Air entry point maintained in good working order. Visual inspection of air cleaner looks to have plenty of life at 3000 mi. Truck went to shop and needs a new engine. Low compression. Shop say's engine dusted. What would you say the change interval of the air cleaner should be?