I love how easy this oil is to apply with the aerosol can. Plus the greenish color makes it easy to verify the coverage is uniform. I also like the fact that it doesn't drain out of the air filter when the bike is just sitting, Only dislike is how hard it is to remove without the specific filter cleaner. Yes I'd recommend this to a friend, however I'd recommend getting the oil and the cleaner.
By far, this is the best air filter oil ever made. I have used almost every filter oil made and nothing compares to Twin Air Bio. Very easy to apply and dries perfect. I live in Florida where we ride a lot of sand and the air filters are the most important maintenance you can do. I highly recommend this oil. Buy the plastic Twin Air oil container and make oiling your filter super easy.
I follow the instructions for this oil and have no problems with it running or how sticky it is. I only put it on dry filters and give them time for the oil to set up once it's applied. If you only have one filter for your bike go buy another one, you can always have one ready to go. Your life will be much easier, and your top end will be happy happy happy.
I bought this to try and it took me a full can of filter oil to get the filter even remotely close to being covered. I ended up cleaning it off with Maxima Filter Cleaner and then applied another filter oil (also spray can). It covered the filter quickly and I hardly used any. This stuff, what a waste of $$$
Twin Air's bio-degradable runs off the filter unless you put it on very lightly. It doesn't stain and is "green" so that's good but it doesn't stay on the filter than an air filter oil should and thus is nothing more than "fair."