Can oscars live with kissing gouramis?

Verdict
Yes

Yes. Oscars and kissing gouramis make a good pair. Both are fine at 74–81°F. Plan on at least 75 gal.

OscarOscar74–81°F · pH 6–8 Kissing gouramiKissing gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 74–81°Oscar 74–81°Kissing gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–8Oscar 6–8Kissing gourami 6–8
The green band is the pH both tolerate.

Size to scale

Oscar · 12 inKissing gourami · 10 in0"2"4"6"8"10"12"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

OscarKissing gourami
Temperature74–81 °F72–82 °F
pH6–86–8
Adult size12.0 in10.0 in
Minimum tank75 gal55 gal
TemperamentSemi-aggressiveSemi-aggressive
Swims atMiddleMiddle
GroupAlone or in pairsAlone or in pairs
DietCarnivoreOmnivore

Better tank mates for oscars

All oscar tank mates

Better tank mates for kissing gouramis

All kissing gourami tank mates

Questions

Can oscars live with kissing gouramis?

Yes. Oscars and kissing gouramis make a good pair. Both are fine at 74–81°F. Plan on at least 75 gal.

What temperature suits both oscars and kissing gouramis?

74–81 °F. Oscars need 74–81 °F, kissing gouramis need 72–82 °F.

What size tank do oscars and kissing gouramis need together?

At least 75 gal, set by the oscar. Add space for each extra fish.