I use the regular Honda oil, is there any additives(Marvel Mystery, Lucas...etc.) anyone can suggest? 116,000mi.
I assume when you say the Regular Honda oil you are referring to the dino oil and not their synthetic blend? Oil has come a long way over the years and additives are not really needed depending on the type of oil that you buy. As Honda does not manufacture its own oil (labeled for Honda) you have a few Valk friendly oils that already have the additives to them, not referring to the dreaded "Friction Modifiers" that are a huge No-No for wet clutches. By the way ALL Mobil 1 products now have the friction modifiers in the additives thanks to the old epa.

If you want to do the research on synthetic oils and their ingredients there is plenty of reports on the web. For example
http://www.vfrworld.com/tex_vfr/tech/oil.htmBottom line? Save some bucks and buy another brand that has what you want and nothing that you don't want i.e. Rotella T Synthetic.
