I bought some Mobil1 0W-30 oil for my '93 Sentra. It promises 2% better MPG and says that it is approved for applications where 5W- or 10W-30 is recommended. So, I get 35 MPG on my Sentra on a good day and this oil should take it to 35.7 and, presumably, a bump in power. My car has 211,000 and burns no oil, so the thinness of the oil should be no problem. I'll report back if the results are spectacular but in the meantime, has anyone used it?