I do apologize for the miscommunication. Being a 2014 Lexus/Toyota vehicle, they do recommend a synthetic 0W-20 motor oil and the car does hold almost 7 quarts of oil. We use the dealer recommended fluids when performing a service. If we did not discuss this with you prior to service, I do apologize as this is a normal procedure. I assure you, we treat everyone equal whether male or female, young or old. If you will give us another chance, I will figure out a way to make this up to you. Thank you.