Preheat oven to 275 degrees F (135 degrees C). Coat a 9-by-13-inch metal pan with vegetable oil, then set aside.
Mix oats, wheat germ, brown sugar, salt and hemp seed in a bowl. Bring syrup, oil, water to a simmer in a saucepan over low heat. Pour onto your oat and seed mixture, and stir to combine.
Pour mixture onto prepared pan while working the cereal into clumps. Bake for 30 minutes. Stir in the raisins and continue to bake until golden brown, about 15 minutes longer. Let cool. (Granola can be stored in an airtight tin for up to two weeks.)
You can double the recipe, but bake the granola in two pans. You also may need to increase cooking time. The key is to bake the granola until it is an impressive golden brown.