After reviewing WTD's oil analysis and Mobil informing him that since he would need 3K oil changes, he might as well use conventional oil, I have a question(s). -Is there any benefit to using synthetic if you prefer or need 3K oil changes? - If the vehicle is not used every day, say 3 times a week, is synthetic advantageous? I read that synthetic will flow faster and reduce wear on vehicles that are not driven regularly. - If someone goes back to dino after using synthetic, are there any adverse effects to the engine? As one of the least educated/experienced on "oil science" I appreciate your comments.