Where on a car can i get information about tank capacity

The operators guide has it.
and varies by country.
and engine options
and other options.
why not just fill it up from empty, and guess.

if car is USA, is it?
and you know whats on the car, engine size and type. and if 2wd or 4wd and other things, SR 5 and other options.
the login to alldata.com
but for free, you can go to any seller of any tanks and see this.
on 91 they had 5 major option packages. SR5 with V6 too.

the base 4 banger shows 17 and 19 gallon here.
see it?

http://www.rockauto.com/catalog/raframecatalog.php?ck[mkt_US]=true&ck[mkt_EU]=true&ck[mkt_CA]=true&ck[mkt_MX]=false&ck[year_1994]=true&ck[ID]=0&ck[idlist]=0&ck[viewcurrency]=USD&ck[PHP_SESSION_ID]=kmn2mr0latem2ta7d7s59vvgk2


spectra premium can be seen on line and checked for size.