Yes I do.
I also use’
It Shines Like a Diamond in a Goats Ass.
When I was in High School, too many years ago.
There was a High Performance parts shop & they had a Sign that said,
Speed Costs etc.
I thought it was pretty cool & it made Sense.
Back in the 60’s.
Still true today.
It would benefit RamAir to update their web site, instructions, blog and support areas.
RamAir appears to be a UK company, with a US distributor. They sell two broad types of filters: foam and pleated "nanofiber".
The oil referenced is to support the foam filter media.
I cannot find a reference as to if the pleated filters require oiling. The filter itself has no markings. Other companies' would say, "Do not oil.". Their UK site has not updated their blog page in three years. They do not have a support section. Company-sponsored cleaning instructions would be welcome.