While pressing on the Gas while driving the car wouldn't move, ( the gear was on Drive) it just moved back while I was on a hill... I can hear the gas running but the car won't accelerate. No warning lights came on for me to know what was wrong with it. But I will need to change my oil soon... hope that's not why its doing that. The time I need to change it is 170967 but now its at 170924. Whats the problem here? Please see this at your earliest convenience.