I like this No Toil spray better than the oil for the ease of application. Clean up is easy too.
The original No-Toil Air Filter Oil is a super-tacky, dirt-grabbing, water-resistant filter oil that increases horsepower. It will not wash out with gas, solvents or water alone. But, you'll be amazed at how quickly and easily your filter will come completely clean with the highly concentrated No-Toil Air Filter Cleaner (sold separately) and water. The filter will be super tacky and ready for use quickly due to the alcohol carrier. This oil will work on both foam and fabric filters (K&N).