I always buy the 90/10 ground beef. Usually, I usually buy the organic packages sold at Costco. If you want your meatloaf to be less greasy use the 90/10 ground beef. 90 is for the quantity of beef and 10 is for the percentage of fat. So if you buy let's say 80/20 beef there you have a larger percentage of fat that in the end reduces the size of the meatloaf.