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Diesel prices in Mountain Ash

Compare current diesel (B7) across 3 Mountain Ash forecourts. Check the lowest listed price, local average and map before choosing where to fill up.

Lowest listed diesel forecourt in Mountain Ash

197.9p/l

Lowest listed diesel price in Mountain Ash

Rontec Mountain Ash1.8 mi from Mountain Ash centre
DirectionsStation details
Diesel local average
199.2p/l
Local forecourts
3
UK comparison
Above

View station

Live local prices

Current diesel prices in Mountain Ash

3 current diesel (B7) prices from 3 Mountain Ash forecourts listed as stocking diesel.

Prices checked 20 Oct 2026, 07:32. Individual rows show when that forecourt price was reported.

Current diesel prices in Mountain Ash. Ranked by Diesel (B7) price.
ForecourtPostcode and reportDiesel(B7), selected rankingDistancefrom Mountain Ash centreOpening timesActions
1Rontec Mountain AshEssoCF45 4HTReported 16 Oct 2026, 13:26197.9pCheapestDistance: 1.8 miOpen 24 hoursMonday - Sunday: 24 hours; Bank holidays: 24 hoursDetails
2MAbercynon Service StationMurcoCF45 4LJReported 19 Sept 2026, 23:37199.9pDistance: 0.2 miOpen 24 hoursMonday - Sunday: 24 hours; Bank holidays: 24 hoursDetails
3VMfg AbercynonValeroCF45 4YXReported 15 Oct 2026, 23:46199.9pDistance: 1.6 miOpen 24 hoursMonday - Sunday: 24 hours; Bank holidays: 24 hoursDetails

How to read this page

About diesel prices in Mountain Ash

Coverage, freshness and comparison scope matter as much as the headline price.

Mountain Ash has 3 forecourts listed as stocking diesel (B7), with current prices available from 3. The table ranks forecourts by current diesel (B7) price, with distance and station name used to order equal or unavailable prices. Station status, distance and update freshness remain visible for comparison.

This page focuses on Diesel (B7) using official UK Fuel Finder data, local averages, regional benchmarks and UK average comparisons where coverage is available.

Thirty-day evidence

Thirty-day diesel (B7) price trend

Thirty-day diesel (B7) trends, local comparisons and potential savings from official UK Fuel Finder data.

202p199p195p
  • 20 September 2026: local 199.9: region 196.1: UK 196.3
  • 21 September 2026: local 199.9: region 196.7: UK 196.9
  • 22 September 2026: local 199.9: region 197.4: UK 197.3
  • 23 September 2026: local 199.9: region 197.9: UK 197.7
  • 24 September 2026: local 200.6: region 198.4: UK 198.3
  • 25 September 2026: local 200.6: region 198.9: UK 198.8
  • 26 September 2026: local 200.6: region 199.1: UK 199.1
  • 27 September 2026: local 200.9: region 199.2: UK 199.2
  • 28 September 2026: local 200.9: region 199.6: UK 199.6
  • 29 September 2026: local 200.9: region 199.7: UK 199.8
  • 30 September 2026: local 200.9: region 199.8: UK 199.8
  • 1 October 2026: local 200.9: region 199.8: UK 199.8
  • 2 October 2026: local 200.9: region 199.8: UK 199.9
  • 3 October 2026: local 200.9: region 199.9: UK 200
  • 4 October 2026: local 200.9: region 199.9: UK 200
  • 5 October 2026: local 200.9: region 199.9: UK 200
  • 6 October 2026: local 200.9: region 199.7: UK 199.9
  • 7 October 2026: local 200.9: region 199.6: UK 199.8
  • 8 October 2026: local 200.9: region 199.5: UK 199.7
  • 9 October 2026: local 200.9: region 199.4: UK 199.7
  • 10 October 2026: local 200.9: region 199.4: UK 199.7
  • 11 October 2026: local 200.9: region 199.4: UK 199.7
  • 12 October 2026: local 200.9: region 199.4: UK 199.6
  • 13 October 2026: local 200.6: region 199.3: UK 199.4
  • 14 October 2026: local 200.2: region 199.1: UK 199.3
  • 15 October 2026: local 199.6: region 199: UK 199.2
  • 16 October 2026: local 199.2: region 198.9: UK 199.1
  • 17 October 2026: local 199.2: region 198.8: UK 199.1
  • 18 October 2026: local 199.2: region 198.8: UK 199.1
  • 19 October 2026: local 199.2: region 198.8: UK 199.1

Average price

199.2p/l

20 Sept to 19 Oct

30-day low
197.9p/l
30-day high
202.9p/l
Movement (30 days)
-0.7p/l
Volatility
Low
Jerry holding a light bulb and presenting a fuel-price insight

Jerry's diesel trend read

Diesel in Mountain Ash fell 0.7p/l, from 199.9p/l on 20 September to 199.2p/l on 19 October. The fall was not continuous: prices briefly rose 1p/l from 23 September to 27 September before moving lower again. Mountain Ash's current average is 0.1p/l above the UK average. Daily movement volatility is low.

Consistency, not just today's lowest

A consistently competitive diesel forecourt

This recommendation requires at least 21 completed reporting days and a current price no higher than the local average.

Rontec Mountain Ash

197.9p/l today

1.3p/l below Mountain Ash average today

Near cheapest
Within 1p on 30 of 30 days
Daily cheapest
Cheapest on 30 of 30 days
Average gap
0p/l average gap
Evidence
30 of 30 days reported
DirectionsStation details

Rontec Mountain Ash stayed within 1p/l of the daily cheapest diesel price on 30 of 30 reported days, averaging 0p/l above the daily cheapest price.

Price choice

Potential diesel savings

Cheapest versus average is the practical comparison. Cheapest versus highest is the maximum listed difference, not a guaranteed saving.

Current local price range

2p/l

197.9p/l cheapest, 199.9p/l highest

Cheapest versus local average
£0.71 less than the local average on a 55-litre fill
Cheapest versus highest
£1.10 maximum listed difference on a 55-litre fill

Comparing current diesel prices in Mountain Ash can avoid paying up to 2p/l more than the cheapest listed price.

Diesel (B7) compared with nearby locations

Ranked by current average diesel price. Mountain Ash is highlighted so the local baseline remains easy to find.

  1. 1Pontypridd5.9 mi, 6 reporting197.1pAverage-2.1p/lCheapest 195.9p
  2. 2Aberdare4.6 mi, 4 reporting197.6pAverage-1.6p/lCheapest 196.7p
  3. 3Tonypandy5.2 mi, 2 reporting197.8pAverage-1.4p/lCheapest 195.7p
  4. 4Mountain AshHereCurrent location, 3 reporting199.2pAverageBaselineCheapest 197.9p
  5. 5Porth5.5 mi, 2 reporting199.4pAverage+0.2p/lCheapest 198.9p
  6. 6Treharris1.9 mi, 2 reporting200.9pAverage+1.7p/lCheapest 199.9p

Pontypridd has the lowest nearby average shown at 197.1p; it is 2.1p/l cheaper than Mountain Ash.

Local market evidence

Diesel market in this location

Distribution, station consistency and forecourt type provide different evidence. None is treated as a guarantee of the next pump price.

Price distribution

197.9p to 198.6p1 station
198.6p to 199.2p0 stations
199.2p to 199.9p2 stations

The largest group of reporting diesel forecourts in Mountain Ash sits in the 199.2p to 199.9p range.

Cheapest station consistency

  1. 1Rontec Mountain Ash30 days
  2. 2Abercynon Service Station23 days
  3. 3Mfg Abercynon4 days

Supermarkets and other forecourts

Supermarkets
No price
Major brands
199.2p/l
Independent forecourts
No price
Named local evidence: Esso.

Where value persists

Diesel brand reliability over 30 days

Historical claims render only when the documented reporting thresholds are met.

No brand has at least two Mountain Ash forecourts and 21 days of diesel evidence for a reliable 30-day comparison.

Areas with the cheapest diesel in Mountain Ash

  1. 1Newtown1 reporting, 1 below average197.9p/l
  2. 2Bryntirion1 reporting, 0 below average199.9p/l
  3. 3Carnetown1 reporting, 0 below average199.9p/l

Good to know

Fuel price FAQs for Mountain Ash

Use the current local evidence to choose a forecourt, compare nearby places and understand how coverage and freshness affect the figures.

Where is the cheapest diesel (B7) in Mountain Ash today?
The cheapest listed diesel (B7) price in Mountain Ash is 197.9p/l at Rontec Mountain Ash. Check the table before travelling because distance, opening status and recent updates can affect the best choice.
How are Mountain Ash diesel (B7) forecourts ranked?
Forecourts are ranked by their current diesel (B7) price first. If prices are tied or unavailable, the table uses distance and station name. Use the forecourt comparison to sort and inspect the current results.
Are diesel (B7) prices in Mountain Ash below the UK average?
Diesel is above the UK average by 0.1p/l. These comparisons use current location averages and the latest benchmark data available to the page.
How recent are the Mountain Ash fuel prices on this page?
Prices checked 20 Oct 2026, 07:32. Individual prices can remain unchanged between checks until a retailer reports a price change.
Why do some Mountain Ash forecourts not show a current diesel (B7) price?
A forecourt can be listed when it is known to stock diesel (B7), even if there is not a current reported price available for that fuel. The price table keeps those stations visible but prioritises forecourts with current prices.
Should I compare nearby locations before filling up in Mountain Ash?
Nearby comparisons currently show Treharris at 200.9p/l, 1.7p/l more expensive than Mountain Ash, Aberdare at 197.6p/l, 1.6p/l cheaper than Mountain Ash and Tonypandy at 197.8p/l, 1.4p/l cheaper than Mountain Ash. Compare Treharris, Aberdare, Tonypandy and Porth.
How can I compare fuel prices around my current location?
Use cheapest diesel near me for a distance-led comparison based on your current position.

Built on real fuel-price data

Prices are sourced from the UK Government Fuel Finder scheme. Prices checked 20 Oct 2026, 07:32. See how we qualify and compare prices

Retailer reporting target
30 minutes