It's almost too small a detail, but I will go either way if I see it used in corporate print documents (brochures/mailers/dealer postcards).
"Please stand by..." [transmits test pattern]

Ebay listings (current):
http://cgi.ebay.com/1959-Oldsmobile-98-Holiday-SceniCoupe-Magazine-Ad-_W0QQitemZ190224355539QQcmdZViewItem?IMSfp=TL0805280158r20932#ebayphotohosting

http://cgi.ebay.com/1964-Oldsmobile-Ninety-Eight-64-OLDS-Vintage-Auto-Ad_W0QQitemZ230182424482QQihZ013QQcategoryZ10777QQrdZ1QQssPageNameZWD1VQQcmdZVi- ewItemQQ_trksidZp1638Q2em118Q2el1247#ebayphotohosting

The advertising copy was written in accordance with the rules of English grammar. I would agree with the inclusion of the hyphen.

With a dash for Ninety Eight?
I'll make the changes later today.

I have an idea for this. All 98's of every generation should be "Ninety Eight". 88's from 195?-1985 should be "88" (or "Delta 88" if permits), while the downsized front wheel drive models from 1985-1999 should be "Eighty-Eight" as that is how they were branded for those years.

But shouldn't it be written in letters for some models?
Else I can simply rename all Ninety-Eight to 98

Would it be possible to create a code or script that would redirect "ninety-eight," "ninetyeight," or "ninety eight" to a single "98" depository or index? Would not be case sensitive, but should not accept misspellings either.

Na taxi, it is a Buick (hence the "Roadmaster" moniker. The last one of those was a station wagon of 1996 here).

My avatar is from an artist, and what you see is the whole thing. I thought it was a cool detail piece, and that color stands out against the white of this board. Cheers!

Thanks. Yours is neat too. What kind of car is that? I'm gonna guess 1958 Pontiac? I'm probably waaaay off
I don't know too much about 50s-60s cars, I'm mostly into 70s-80s-90s-00s cars.

Interesting, taxiguy. Cool avatar as well! Being the mid-priced series, spelling out Eighty-Eight doesn't do it for me. I never thought Olds would try that!

I'm pretty sure 98 should be "Ninety-Eight". I'm not so sure about 88 though...

Here it says "88":

http://upload.wikimedia.org/wikipedia/commons/d/db/77-85_Oldsmobile_Delta_88_Coupe_1.jpg

Here it says "Eighty-Eight":

http://www.imcdb.org/vehicle_80122-Oldsmobile-Eighty-Eight.html

We should decide what to use on the site... but as I do not know these cars at all I can only wait that some other members give detailed info or take a decision.
Either we name all in the same way by facility purposes, or we decide what do use for which range of years.