I got a Pipercross panel air filter and it came with an "air filter dirt retention additive" which is the oil spray trap dirt. How much of it do I actually spray on the filter?
The filter has 2 layers- a black coarse foam with pyramid shapes (faces the outside air side) and the red fine foam (faces the engine), if that makes sense. I've sprayed quite a bit on the black side such that it's quite visible (i.e. looks wet). I took it for a 10-mile drive (including motorway) and parts of it still look wet. Is that too much?
In case you're wondering, no it didn't come with instructions on how much to spray. I did a web search and other people seem to have the same problem.