Accessing a prototype function while sorting an array?

I am having problems wrapping my brain around a scoping issue using a prototype function in an array while sorting it. I can make it work on a static item, but when I attempt to generalize to work on the array I start seeing "is not a function" errors. Here is my current rendition of the code. Any help would be appreciated.

function Automobile(year, make, model, type) {
    this.year = year; //integer (ex. 2001, 1995)
    this.make = make; //string (ex. Honda, Ford)
    this.model = model; //string (ex. Accord, Focus)
    this.type = type; //string (ex. Pickup, SUV)

}
Automobile.prototype.logMe = function(bool) {

    console.log("Working"); //testing function
    if (bool == true) {
        console.log(this);
    }

};

/*Sample Array*/
var automobiles = [
    new Automobile(1995, "Honda", "Accord", "Sedan"),
    new Automobile(1990, "Ford", "F-150", "Pickup"),
    new Automobile(2000, "GMC", "Tahoe", "SUV"),
    new Automobile(2010, "Toyota", "Tacoma", "Pickup"),
    new Automobile(2005, "Lotus", "Elise", "Roadster"),
    new Automobile(2008, "Subaru", "Outback", "Wagon")
];

/*This function sorts arrays using an arbitrary comparator.*/
function sortArr(comparator, array) {


    array.sort(function(a, b) {
        return comparator(a, b);
    });
    return array;
}

function exComparator(int1, int2) {
    if (int1 > int2) {
        return true;
    } else {
        return false;
    }
}


function yearComparator(auto1, auto2) {
    return exComparator(auto1.year, auto2.year);
}

/* Output*/
console.log("*****");
console.log("The cars sorted by year are:");
forEach(sortArr(yearComparator, automobiles), automobiles.logMe(true)); //This is not right!


function forEach(array, doStuff) {
    for (var i = 0; i < array.length; i++)
        doStuff(array[i]);
}