If cooking a parave item in a meaty oven (let’s say a cake), and one used milky utensils to make it. Would this present any issues (assuming that if being baked in a meaty oven, it would be best to use meat utensils, but in a case where this was not followed), would this affect the kashrus of the meat oven?
The oven will still be meaty. This is even though the utensils were milky, but they didn’t give over any milk taste to the ingredients, and even if they did, the amount would be negligible, and botil. Therefore, although we shouldn’t do this l’chatchila, but if it was done, the oven is still meaty.