Skip to main content
toolcool
Life

China Oil Price Adjustment Countdown & Refuel Savings Calculator

Count down China's next fuel price adjustment window based on the NDRC 10-working-day cycle. Combine tank capacity, remaining fuel and expected change to decide whether to fill up now or wait. Supports 92/95/98 gasoline and 0# diesel.

Overview

China's retail gasoline and diesel prices are adjusted every 10 working days by the NDRC, triggered when the crude-oil-linked wholesale change reaches ±50 RMB/ton. This tool helps drivers quickly decide whether to fill up now or wait. Enter current price, tank capacity, remaining fuel, and expected change — get a natural-day / working-day countdown, a side-by-side cost comparison, and an annualized savings estimate.

How to use

  1. Select your province — the tool auto-fills that province's reference retail price.
  2. Select fuel grade: 92-, 95-, 98-octane gasoline or 0# diesel.
  3. Enter the current pump price, tank capacity, and remaining fuel percentage.
  4. Fill in the next adjustment date (defaults to 10 natural days from today) and expected price change (available in Chinese financial media).
  5. Optionally enter weekly mileage and fuel consumption per 100 km to see the annualized impact.
  6. Results show a side-by-side comparison of filling now vs. after the adjustment, plus a clear recommendation.

Formula

Liters needed: litersToFillNow = tankCapacity × (1 - remainingPercent / 100). Cost to fill now: costFillNow = litersToFillNow × currentPrice. Projected new price: projectedNewPrice = currentPrice + expectedPriceChange. Cost to fill after: costFillAfter = litersToFillNow × projectedNewPrice. Savings by filling now: savingsIfFillNow = costFillAfter - costFillNow. Working days until adjustment: count Mon-Fri days between today and nextAdjustmentDate. Annualized impact: (weeklyMileage × 52 / 100) × fuelConsumption × expectedPriceChange. Trigger rule: NDRC adjusts every 10 working days when crude-oil-linked wholesale change reaches ±50 RMB/ton. Threshold: savings within ±5 RMB is treated as no meaningful difference.

Common scenarios

Scenario 1 · Price hike expected — fill now

50 L tank, 20% remaining, 92-octane at ¥7.50/L, +¥0.15/L expected. Need 40 L; filling now costs ¥300 vs ¥306 after — save ¥6. Recommendation: fill up before the adjustment.

Scenario 2 · Price cut expected — wait it out

50 L tank, 20% remaining, ¥7.80/L now, -¥0.12/L expected. Filling 40 L now costs ¥312 vs ¥307.2 after — save only ¥4.8 (near the no-difference threshold). For a larger 70 L commercial tank, the gap grows to ¥8.4 and the tool recommends waiting.

Scenario 3 · Flat cycle (no change)

Current ¥7.60/L, 0 expected change (cycle may flatten). costFillNow equals costFillAfter regardless of liters. Tool advises: no meaningful difference, refuel as needed.

FAQ

What are China's fuel price adjustment rules, and why every 10 working days?

Per the NDRC Oil Pricing Regulations, domestic retail gasoline and diesel prices are linked to international crude oil, with a 10-working-day cycle. An adjustment is triggered when the crude-linked wholesale change reaches ±50 RMB/ton; otherwise the cycle is deferred. Working days are used (vs. calendar days) to smooth out weekend volatility.

How is the crude oil change rate calculated, and what level triggers an adjustment?

The rate is the weighted 10-working-day average of Brent, Dubai and Cinta crude prices vs. a base. Once translated to domestic wholesale per-ton prices, a change of ±50 RMB/ton or more triggers adjustment; amounts below that roll into the next cycle.

Full tank vs half tank — how much does the choice actually save? How does this tool help?

Savings = litersToFillNow × expectedPriceChange. For a +¥0.15/L hike and 40 L gap, filling up saves ¥6; filling only half (20 L) saves ¥3. The tool converts your remaining-fuel input directly into liters needed, for a one-click comparison.

92- vs 95- vs 98-octane gasoline — which should I choose, and is higher-octane really worth it?

Pick by engine compression ratio: ≥10 usually needs 95; turbo / high-performance engines may need 98; low-compression family cars are fine on 92. Higher octane doesn't mean better mileage — it just burns more stably and avoids knock. If your manual says 92 is OK, running 95/98 typically brings no real savings, only a higher bill.

Do EV owners still care about oil prices? Is this tool useful for hybrid drivers?

Pure EVs barely care — little fuel is used. But PHEV and range-extender owners still rely on gasoline on long trips. Enter your real L/100km and weekly mileage and the tool estimates annualized cost impact, helping decide whether to fill up before an adjustment.

Why do prices differ across Beijing, Shanghai, Yunnan, Hainan? Where does the tool's baseline come from?

The NDRC sets nationwide adjustment amounts, but baseline prices vary by province due to transport, local taxes, and income levels. Yunnan, Tibet and Hainan are typically ¥0.1–¥0.5/L higher than top-tier cities. The baselines in this tool are recent public references — always confirm at the actual pump.

How to find the next adjustment date, and does it get postponed on holidays?

The NDRC usually announces a new price at 24:00 on the adjustment day. The 10-working-day cycle does get postponed for official holidays (Spring Festival, National Day, etc.). The latest dates are published by Xinhua, CCTV Finance, or the NDRC website. This tool excludes weekends from working-day counts but does not hard-code Chinese public holidays — for postponement, defer to the official announcement.

Why are adjustment predictions imperfect? Can the tool's estimate drive real decisions?

Predictions depend on international crude prices, FX, and geopolitics, and can shift until the last working day, typically drifting ±¥0.02–¥0.05/L. This tool gives estimates based on the predicted change, which should be treated as a range, not a hard number. Savings per refuel are small — refuel on need and simply track the rhythm of adjustments.

Related tools