Simple answer - Go with the RaceDeck you won't regret it. For a 24x24 garage it probably will only cost $250-$300 more than VCT (with adhesive) and is much easier to install and will hold up better. If you floor isn't perfect underneath, it will show through the VCT. The RaceDeck will hide all kinds of imperfections, I have several baseball size potholes in my floor that we didn't fix and you would never know it.
As far as spilling oil, I have had large oil, coolant, power steering fluid and transmission fluid spills on my floor. Many sat for 2 weeks or more. I just pick up the spilled fluid with paper towels and mop the floor with a 50/50 water/Simple Green mix and it looks like new.
The only way you are going to damage the RaceDeck is if you drop hot metal on it or put alot of weight in a very small area. I use a regular floor jack and jack stands all the time directly on the floor and haven't damaged it yet.
I can give you more detailed info if you want, just let me know. My floor sees alot more abuse than most members here. Cars/motorcycles are moved in and out daily, I move heavy equipment on small casters on it, run a forklift on it, have several lifts directly on top, and my tire changing equipment, air compressor, workbenches, shelving, etc sit directly on top.
A few pieces of advice if you go RaceDeck. The graphite and alloy colors hide the dirt alot better than the black, blue or red I have. Also make sure when you order it you tell them you are a Garage Journal member and they will give you a discount, it is much more affordable than you may think.