Date registered: Dec 2005
Location: United States
Mentioned: 3 Post(s)
Quoted: 397 Post(s)
Okay, it's entirely unnecessary to insult the guy, who came here with a simple and relevant question.
On most car-enthusiast boards, there is a consensus that premium fuel should be used wherever specified. However, there is a consensus elsewhere that modern technology (as mentioned in this thread) makes the question almost academic.
Regular fuel won't do damage, but it also won't provide power-to-spec at the margin. About whether or not it wastes fuel, I have yet to see a conclusive reference, and if someone has one, I'd appreciate seeing it.