Oil Change: Make It Regular - Your Engine Will Run Smoother
A lot of oil is used to manufacture new car parts-resources which might be saved by recycling.
This alone may scare off the intruder or is effective also to fend off an unfriendly dog. If that is the case, involving expensive will probably be the better option. One reason is that insurance companies can save money themselves by dropping off wrecked vehicles at a recycling yard.