A jet engine always produced roughly one m3 steam for every liter fuel burned. It converts all the fuel into steam and CO2 (except for a tiny part not completely burned fuel which generates black smoke).
You never see steam. Steam is invisible.
What you see on a cold day at your car exhaust is the steam condensing into water droplets. What you see is not steam, but liquid water. Air can only contain a certain amount of steam, and that amount is very dependent upon air temperature. When that amount is exceeded, then the remaining steam condenses into water droplets. Normally you see the water droplets from your car exhaust only for a short while after starting a cold car. In that situation the steam condenses to water droplets already inside the still rather cold exhaust pipe.
The contrails behind a high cruising is steam which have condensed into water droplets which immediately froze into ice particles due to the low ambient air temperature. At those very low temperatures air can contain very little steam, therefore it condenses.
Normally we do not see exhaust from a jet engine on the ground. That is because the steam is less concentrated since only a part of the air in the engine core is actually used for combustion, and because the exhaust is immediately mixed with the ambient air and the fan air, and because the exhaust is very hot.
If we imagine that we connected a several hundred feet long steel exhaust pipe behind the engine core (core alone, not the fan), then we might on a cold and damp day see condensation from the end of that pipe, until the pipe itself got hot. Such a test would be similar to your car.
Always keep your number of landings equal to your number of take-offs