Hi,
Owner's manual for mine says to use 5w30 and the 1.8 liter is supposed to use 5 quarts.
You will also find that there is no shop manual available for this car either, to remedy this I have a growing web page devoted to just the 1999 Suzuki, it mainly only covers the 1.6 liter with automatic transmission but may have some things in common with the 1.8 liter version.
URL =
http://home.comcast.net/~lj_robins/99suzuki/
You can email me with any questions you may have.
No idea about the color codes.