Look on the engine valve cover. You will see a large cap labeled OIL or it may have the weight listed as in 5w-30. That is where you add oil.
what gearbox oil doe's a hondacivic 1.4 1999 use?
WITH GREAT DIFFICULTY
5w-30 api sj or better
remove bolts and clip. Then remove oil dipstick tube.
Drop the header pipe and unbolt the oil pan and drop it.
if you don,t know the answer don,t try and do it yourself
It should tell you on the oil cap you remove to add the oil. My Civic DX uses 5W 30.
Honda civic 2003 -what is the best engine oil for hot weather?
The engine oil capacity for a 1999 Honda Civic is 3.5 quarts. (Just in case you meant transmission fluid - since you mentioned it's an automatic - the A/T fluid capacity is 3.0 quarts. Note, if you have a GX or HX model with a Continuously Variable Transmission, it will take 4.0 quarts of Honda CVT fluid).
A 2003 Honda civic si needs five quarts of oil.
capacity with a new oil filter is 3.8 qts. 1996 Honda civic ex
The 1995 Honda civic dx transmission does not come with oil filter.