Originally Posted by xniperliams
Do you experts think that applying spray lube is necessary inside a motor? Is there any harm or good? I am referring to something like the well-known WD-40. Appreciate for your advice.
I am not an expert but WD 40 is not what you're looking for. Actually quite the opposite. For cleaning try some sort of alcohol (there's plenty on offer for various jobs but they mainly rely on two alcohols, either methyl or isopropylic, either will do, just read the can and buy the cheaper). Buggy blast is just one of these (I think is isopropylic) but is not the cheapest option. Brake cleaner, electronic spray cleaner, etc are the same thing and some are cheaper depending on brand, etc. Just make sure you use something that doesn't leave any residue.
For lubrication you need either bushing oil or bearing oil both offerred in various forms each with their cohorts of fans. In principle bushing oil is a light machine oil, bearing oil is pretty close, a bit thicker.