So lately my car has been getting shitty mileage (16mpg, 2001 Honda Accord) and I've been concerned about it, but unsure of what to do. I have a new CAI, tires are good on pressure, and plugs are relatively new as well. Today I went in for an oil change and the dude tried telling me that my car might be burning oil because I was low on oil. I told him with 48,000 miles there is no way I'm burning oil. Then when they drained the oil he showed it to me and it was pitch black. He asked if I had missed an oil change, and I haven't. Faithfully had it done every 2800-3000 miles. I feel like my mileage blows (and I've addressed this in another thread) but I believe a big factor in it is how short of a commute I drive. It's 2.0 miles to my work each way. My car rarely has time to fully warm up, especially being that it's winter now. Also, winter gas I typically read about having an impact on people's gas mileage, so I'm not terribly worried about that. I know that oil change places tend to try and sell you every extra thing that they can (offered me some $70 engine cleaner shit that I denied), but is it regular for oil to be so dark with regular changes? Cliffs: Oil was pitch black after regularly scheduled oil change. Normal?