Originally Posted by
falconred
You can of course take BART from SFO to OAK (via Oakland Colosseum and free shuttle), for $8.80 each way.
Bart is the way to go from SFO to OAK. BART is in the terminal at SFO and you connect via a bus at the Oakland Coliseum station. For that price difference, it makes sense to get the car in OAK.