Advantage RC Air Filter Oil (120ml) (4 oz) Goes on Thin  Our Air Filter Oil starts out thin, so it can be easily worked into the air filter. This ensures that the oil is worked through the entire filter, and it is not over-saturated with oil, which can cause engine tuning issues. Outstanding Protection  Once applied, the Air Filter Oil thickens for maximum protection from dust and dirt. No Scent  This new formula does not have a strong odor. Huge Bottle  Our bottle of Air Filter Oil is a better value and much larger than others in the industry. Our bottle is 120ml (4 ounces), and will oil 12-16 filters (depending on the filter size). Compare our size and price to the competition!