So one of the loading screen tips says that blueish exhaust smoke is caused by damaged piston rings. I damaged my piston rings by console command and nothing. As it turned out there is no code for that in combustionEngineThermals.lua file. There are codes for smoke/steam emiting for variety of issues, but not for damaged piston rings. I managed to add it on my own (its just under the blown gasket piece). Smoke is black, but its better than nothing. And it kinda fits to the "rust bucket" cars. Code: if M.pistonRingsDamaged and particleTicks.exhaustSteamParticleTick > 1 and not (parentEngine.isDisabled or parentEngine.isStalled) then obj:addParticleByNodesRelative(n.finish, n.start, absEngineRPM * -0.0004 - 3, heavySmokeParticleType, 0, 1) end Can we have such thing in official game?