I do not know what has been going on lately, but my car (a Saturn Aura 2008 with 4 cylinder ~170hp) has been eating gas alive. My car currently struggles to reach higher speeds, even 40 mph. Within the first two gears the automatic transmission usually shifts around 3500rpm. I do have about 200lbs worth of weightlifting equipment in my car, but it should drop my mpg so drastically. According to the computer I am averaging about 21mpg, when I should be getting 25-28 around down and 30ish on the highway. Any ideas? I did put some seafoam in the tank a few weeks ago. Im not sure if it helped. Im also thinking that my transmission fluid may be low.