What is the average Petrol & Diesel price in St Marys?

The average Petrol & Diesel price in St Marys is 170.9 c/L, ranging from a low of 165.9c/L to a high of 175.9c/L. Compared to the national average, U91 is 10c cheaper than the national average.

How many fuel stations are there in St Marys?

There are 10 fuel stations in St Marys, with 48 more nearby stations within 10km.

When is the cheapest day to buy fuel in St Marys?

New South Wales fuel prices typically follow a 3 to 5 week cycle, with peaks often mid-week (Tuesday-Thursday) and the cheapest days usually Monday or Tuesday. St Marys prices generally lag major metro centres by 24-48 hours. The cheapest pumps in St Marys tend to be mid-week.

What fuel types are available in St Marys?

The 10 stations reporting in St Marys cover the following fuel types: Unleaded 91, Ethanol 10, Diesel, Premium Diesel, Premium 95, Premium 98, LPG (Autogas). Use the fuel-type pills above the price list to switch between them.

How often are St Marys fuel prices updated?

Every 15 minutes. FuelRadar Australia refreshes from the government data program four times an hour. The station count in St Marys is refreshed with each price update (last sync 10:11 GMT+1000, 4 Jun 2026).

Cheap Petrol & Diesel in St Marys New South Wales 1790

All fuel types

Fuel prices in St Marys by type

Low, average and high for each fuel type from the 10 stations tracked here.

Fuel	Low	Avg	High	Stations	Cheapest at
E10	163.9c	168.3c	173.9c	9	OTR Ropes Crossing
U91	165.9c	170.9c	175.9c	10	OTR Ropes Crossing
P95	183.9c	188.9c	191.9c	4	OTR Ropes Crossing
P98	183.5c	194.0c	201.9c	10	Speedway North St Marys
PDSL	206.5c	212.6c	216.9c	8	Pearl Energy Colyton
DSL	204.9c	207.0c	209.9c	4	BP St Marys (Forrester Road)

Top stations

Cheapest Unleaded 91 stations in St Marys

Sorted by current Unleaded 91 price. Tap a station for grades, directions and price age.

OTR Ropes Crossing
Cheapest
1.5 km away · 306 WIANAMATTA PWY, ROPES CROSSING
165.9 c/L
-5.0 vs avg
BP St Marys (Forrester Road)
Fair price
4.0 km away · 120-128 Forrester Road, ST MARYS
167.9 c/L
-3.0 vs avg
Metro St Marys
5.8 km away · 516-526 GREAT WESTERN HWY, ST MARYS
168.5 c/L
-2.4 vs avg
Pearl Energy Colyton
6.5 km away · 86 GREAT WESTERN HWY, COLYTON
168.5 c/L
-2.4 vs avg
Speedway North St Marys
4.7 km away · 91 Glossop St, North St Marys
168.5 c/L
-2.4 vs avg
7-Eleven St Marys
3.2 km away · Corner Forrester Road & Christie Street, St Marys
171.9 c/L
+1.0 vs avg

Showing 6 of 58 stations.

90-day price trend

Unleaded 91

170.9c/L

↓ 8.8c vs 90 days ago

30-day spread · Unleaded 91

St Marys Unleaded 91 cycle

St Marys is currently 7.1c/L below its 30-day average — a relatively good time to fill up.

30-day low

158.5c/L

30-day average

177.0c/L

30-day high

189.9c/L

Today's average

169.9c/L

Daily averageMin–max spread across St Marys stations

Cheapest Unleaded 91 right now

7-day forecast

Central Coast Unleaded 91 forecast

Rising · +2.3c/L over 7 days

Predictions for the next 7 days based on the Central Coast fuel cycle and 90-day history. St Marys typically tracks the Central Coast cycle within a few hours.

3 days until the cycle trough — usually the cheapest day.

Central Coast today

176.1c/L

Predicted in 7 days

180.9c/L

7-day range

175.0 – 182.8c/L

Predicted price90% confidence band

See full 30-day forecast How accurate is this?

Suburb price verdictWell below average

7.0¢ below New South Wales state avg

St Marys average · Unleaded 91

St Marys average

170.9¢

vs New South Wales state avg

177.9¢

-7.0¢

vs National avg

Across Australia

180.9¢

-10.0¢

vs Wholesale (TGP)

What retailers pay before excise/GST

170.4¢

+0.5¢

St Marys sits 7.0c/L below the new south wales state avg for Unleaded 91. Open the map to see how the individual stations in this suburb compare.

Open the St Marys map

St Marys snapshot

Live Unleaded 91 prices in St Marys

Today's prices

In St Marys, New South Wales, the cheapest E10 today is 163.9c with an area average of 168.3c across 9 listed stations. Other fuels tracked in this suburb include U91 from 165.9c, P95 from 183.9c and P98 from 183.5c.

How it compares

St Marys is currently 7.0c below the New South Wales state average of 177.9c. Open the live fuel map to see how individual stations spread within St Marys.

Compare neighbouring suburbs

Cheaper fuel may be nearby — compare Vineyard (from 163.7c), Box Hill (from 163.7c), Oakville (from 163.7c), Riverstone (from 163.7c) or Marsden Park (from 163.7c) before planning a fill-up.

Brands operating here

5 fuel brands operate stations in St Marys, including 7-Eleven, BP, Shell, Reddy and Speedway. Brand loyalty programs and discount apps can shift the cheapest pump by 4–6c/L on any given day.

Nearby suburbs