The original lube on the chain is the best it will see. I usually go at least 1000 miles before I remove, clean and relube my chain.
I use 4pts. mineral spirits to one pt. chain saw bar oil from Ace hardware. After I start using my home brew I remove the chain every 750 miles and repeat. My last 8sp chain lasted 13,000 miles. I do use an ultrasonic cleaner.