Just change your oil at the regular intervals and everything will be fine.
No additives needed.

"cp broome" <cbroome1@carolina.rr.com> wrote in message
news:u5EKa.169068$jp.4735631@twister.southeast.rr. com...
> I see ads for additives like Prolong, for the crankcase and also additive
> for the transmission fluid. Do you have opinions on this stuff? Should
it
> be used in Hondas, specifically 98 Passports? Long while back, my husband
> had a Dodge Caravan for business, and they added that stuff, and believe
it
> or not that junky thing drove without a problem for 300,00 miles! Just
> wondering if that was coincidence, or if this stuff can be damaging
somehow.
> Passport is a 4WD. thanks
>
>