There's not a lot of correlation between car and aircraft mechanics. Many turbine engineers may never have worked on piston engines and the technology in automobile maintenance is far in advance of what you'll find in Lycomings and Continentals anyway. Look at fixed ignition timing and air-cooling for a start. I doubt the local BMW dealership would look at your CV for long...
Another thing, most aircraft maintenance is repetative tasking. Line work is more interesting but read again what spannersatcx says.
Just my opinion.