Whisk vegetable oil, chili powder, lime juice, honey, garlic powder, paprika, and black pepper in a bowl to make a marinade. Place chicken strips into a large resealable plastic bag; pour marinade over chicken. Knead bag to coat chicken with marinade. Squeeze out air, seal bag, and refrigerate 4 hours to overnight.
Preheat an outdoor grill for medium-high heat and lightly oil the grate.
Remove chicken strips from marinade; discard used marinade.
Grill chicken on preheated grill until browned, the juices run clear, and an instant-read meat thermometer inserted into the thickest piece reads at least 160 degrees F (70 degrees C), about 10 minutes per side.
