With premium diesel (B7P) often priced 12p to 18p per litre higher than standard diesel (B7), many drivers wonder whether the enhanced fuel formulas deliver real-world value or merely marketing hype.
What Makes Premium Diesel Different?
Both standard and premium diesel meet British Standard BS EN 590. However, premium formulations (such as Shell V-Power Diesel, BP Ultimate, and Esso Synergy Supreme+) contain specialized additive packages:
- Higher Cetane Number: Enhances combustion speed and cold-start performance, resulting in smoother engine idling.
- Detergent Cleaning Additives: Prevents carbon deposit build-up on high-pressure fuel injectors and intake valves.
- Corrosion Inhibitors & Friction Modifiers: Lubricates fuel pumps and protects fuel delivery lines from premature wear.
Diesel Particulate Filter (DPF) Health:
Cleaner combustion produces fewer soot particles, reducing the frequency of DPF regeneration cycles—especially vital for modern diesels driven frequently in town traffic.
The Verdict: When Should You Use Premium Diesel?
For standard everyday driving, modern standard diesel is fully adequate. However, running a tank of premium diesel every 3 to 4 fill-ups or before long motorway journeys can provide valuable preventative cleaning for fuel injectors and exhaust filters without breaking the bank.