Petrol prices have risen for the fourth month in a row, jumping by 4.5p a litre on average last month, the RAC says.
Unleaded went up from about £1.52 to £1.57 in September, pushing the cost of filling a family car to over £86.
Diesel has risen to £1.63 from £1.54 per litre since the start of last month.
The RAC said increased fuel costs were being driven by higher global oil prices, but it also claimed that petrol was being “overpriced”.
But independent forecourts said they were “not unjustifiably pricing petrol higher than needed”.
Using data from petrolprices.com, these are the cheapest 11 places to fill up in and around Bristol as of Monday, October 9: