After living in a car for three days, Allison Lavey and Jamie Williams are still enthusiastic, though a little smelly.

Instead, the Boston University roommates are busy with daily events, dance-offs, dinner parties and all the pampering their friends and supporters can provide for the Chevrolet Aveo “Livin’ Large” Campus Challenge.

Lavey and Williams are competing with pairs at six universities across the country for online votes and a chance to win three Aveos before the end of the week. Teams must live in the car for five days and win votes from friends, schoolmates and passers-by.

Between organizing canned food drives, mummy-wrap contests and concerts, as well as rallying support from policemen and delivery drivers, Lavey and Williams said they have not had time to think about their lack of sleep or hygiene.

“We get 10-minute bathroom breaks every two hours,” Williams, a University Professors’ Program junior, said, “so we were going to try to run to the [Bay State Road] brownstones and take a shower.”

But Lavey said visits to the bathroom took second place to more pressing issues.

“We decided against it,” the School of Education junior said. “We are comfortable enough with ourselves and each other to forget about the showering and focus on more important things.”

Those things have included a Halloween canned food drive, the contest’s daily challenge for Tuesday. In one day, they collected 587 cans and won the challenge.

But Lavey and Williams also share their lives through two webcams, which transmit live at Aveolivinlarge.com.

The Challenge was inspired by college undergraduates who participated in the national Public Relations Student Society of America day-of-case-study competition in March, according to PRSSA National Professional Advisor Travis Parman.

“The winning PRSSA group presented General Motors with an innovative idea involving peer-to-peer communication leveraging social networking and consumer-generated media,” he said. “We turned those ideas into a campaign that we could execute nationally as the Chevy Livin’ Large Campus Challenge.”

Many BU communities have rallied around Lavey and Williams.

“Even our professors are cutting us a break,” Williams said. “I fell asleep in class, and they were like, ‘That’s okay, she’s living in a car.'”

The pair also meticulously planned ahead so the week could be a time for fun and catching up with friends.

“We have Internet access, so if we wanted to get work done, we could,” Williams said. “But I purposely got ahead on my work, so that this week would be all about the contest and having a lot of playtime.”

GM hopes the contest demonstrates how flexible the Aveo is for the young-adult lifestyle.

“We expect the students who draw the most online votes to be the ones who really demonstrate through their activities what the Aveo is all about: expressive, stylish and fun,” Parman said. “The students can create activities in or around the Aveo, so we will see how creative they get. I think we’re in for some great online entertainment as these student teams express themselves and convey their personalities online to vie for votes.”

Playtime for the girls, featuring silly string, waffles and raves, is always aimed at earning votes and, eventually, the three new Aveos.

“We have had a ‘hug, don’t hate’ party, in which free hugs were given out, a silly string competition, a dance marathon and even a ‘rave’ party with glow-sticks,” Lavey said. “Many groups have come out to support us. The cheerleaders were out here Wednesday, and the snowboarding team also came to make waffles. We also had the band Live in Stockholm come out and play, which is all amazing and very important because we need the support and votes of everyone to win.”

All of their activities have been so successful that Lavey and Williams said they are hesitant to go back to their normal lives once the contest is over Friday.

“We have gotten so used to being here,” Lavey said. “We are even getting neater, if you can believe that. We have gotten used to the car and the space and everything, and it has just been non-stop fun since day one.”

Williams said she is not looking forward to leaving Friday night.

“It will be hard to get back to the real world and leave this bubble we are living in,” she said.

In the meantime, however, Lavey said they are going to enjoy the remainder of the contest and “milk it for all it’s worth.”