After a 600km drive on the highway today I did a post trip inspection and found that my air filter developed a rip in it. The hole was large since it was near the base of the cone where the filter media was attached. It wasn't there a couple days ago when I inspected it so it was recent. I plan to change the oil and and oil filter tomorrow. I am sure some dirt as well as some bug parts got sucked in. How should a go about flushing the dirt out of the engine?