A Fleet Manager’s Guide to Fuel: Types, Costs, and Efficiency

A practical guide to fuel types, costs and efficiency for fleet managers

Commercial fuel types guide by Steve Clarke – Marketing Manager

Are volatile prices at the pump making a mockery of your fleet’s budget? For any UK fleet manager, controlling your company’s spend on fuel is a constant battle, made even more complex by the administrative nightmare of tracking receipts and the growing pressure to reduce emissions. When you’re managing a diverse mix of vehicles, from HGVs to light commercial vans, choosing the right fuelling solution while keeping operational costs down can feel like an impossible challenge.

This comprehensive guide is designed to put you back in control. As your trusted partner in keeping your vehicles on the road for less, we will break down the different fuel types available today—from traditional diesel and petrol to alternatives like HVO. We will share proven, practical strategies to help you cut costs, streamline your expense reporting, and significantly boost your fleet’s overall efficiency. Get ready to turn one of your biggest expenses into your greatest saving and drive your business forward.

Understanding the fuel landscape for UK commercial fleets

For any UK business running a commercial fleet, managing operational costs is paramount. Without question, fuel represents the single largest variable expense, directly impacting your bottom line. The landscape of available options is evolving rapidly, driven by both cost-saving opportunities and significant legislative changes like the 2035 ban on new petrol and diesel van sales. Understanding these choices is the first step towards building a more efficient and future-proof fleet.

Traditional fossil fuels: Petrol vs. Diesel

Diesel (DERV) has long been the workhorse for UK vans, offering excellent torque for heavy loads and superior mileage on long journeys. However, its higher pump price and emissions mean it faces increasing costs within Ultra Low Emission Zones (ULEZ). Petrol, typically found in smaller vans, offers a lower upfront vehicle cost and is well-suited for light-duty urban routes, though it generally can’t match diesel for heavy-load efficiency. While premium fuels with performance-enhancing additives are available, for most standard commercial vehicles, the additional cost per litre rarely provides a justifiable return.

Transitional & alternative fuels

As businesses look to reduce their carbon footprint, transitional fuels offer a practical step. Hydrotreated Vegetable Oil (HVO) is a leading example—a ‘drop-in’ diesel replacement that can cut net greenhouse gas emissions by up to 90% without vehicle modifications. Other options include biofuels like Biodiesel, which blend renewable sources with traditional diesel, and Liquefied Petroleum Gas (LPG), a niche but cost-effective alternative for fleets able to invest in vehicle conversions.

The rise of electricity as a ‘fuel‘

Electricity is now a primary vehicle ‘fuel‘ for a growing number of UK fleets. The financial case is compelling: while petrol or diesel can cost 15-25p per mile, charging an electric van can be as low as 4-10p per mile, delivering substantial operational savings. Successfully integrating EVs means treating charging as a core part of your strategy. Modern fuel management systems now incorporate EV charging data, helping businesses optimise costs and vehicle uptime across a mixed fleet.

The true cost of fuel: A breakdown for Fleet Managers

As a fleet manager, the price you see at the pump is only the tip of the iceberg. To effectively manage your budget and reduce expenditure, it’s crucial to understand what makes up the total cost of your fleet’s fuel. A deep understanding of these components, combined with a strategy to improve overall efficiency as analysed in reports on Fuel economy in the United Kingdom, empowers you to make smarter financial decisions. At Fleetmaxx Solutions, we believe knowledge is the first step to significant savings.

The price per litre isn’t a single figure; it’s a combination of product cost, government taxes, and supply chain margins. Here is an illustrative breakdown:

Fuel duty explained

Fuel duty is a significant fixed tax levied by the UK government on every litre of fuel sold. The current rate is 52.95 pence per litre for both petrol and diesel. Unlike the wholesale cost of fuel, this amount does not change with oil prices, providing a stable (and substantial) component of your total cost. The government has frozen this rate for over a decade to help manage costs for motorists and businesses.

VAT on fuel: The reclaim opportunity

Value Added Tax (VAT) is charged at 20% on the total cost of the fuel and the duty combined. This is a critical point for businesses: if you are VAT-registered, you can reclaim 100% of this VAT. However, this is only possible with a proper VAT invoice for every transaction. This is where many businesses lose money by relying on driver expenses with missing receipts. A fuel card solution from a trusted partner ensures you receive a single, consolidated, VAT-compliant invoice, simplifying the reclaim process and maximising your savings.

Market volatility and its impact

The price of crude oil is notoriously volatile, influenced by global supply, demand, and geopolitical events. This unpredictability makes accurate budgeting a major challenge for fleet managers. Pump prices can change daily, making it impossible to forecast your largest variable expense. This is why many businesses partner with us for fuel cards that offer fixed weekly pricing. This solution provides stability, allowing you to lock in a price for the week and protect your business from sudden market spikes.

How to maximise fuel efficiency and reduce consumption

While the price per litre is out of your control, your fleet’s overall fuel consumption is not. By shifting focus from fluctuating costs to manageable consumption (MPG), you can gain significant control over one of your largest operational expenses. Implementing practical strategies across your fleet can lead to immediate and substantial savings, turning a variable cost into a predictable, optimised expense.

Driver behaviour: The human factor

The single biggest influence on a van’s MPG is the person behind the wheel. Aggressive driving habits can increase consumption by up to 30%. Key areas to address include:

• Harsh Acceleration and Braking: Smooth, steady driving uses significantly less energy.
• Speeding: Driving at 70mph can use up to 25% more than driving at 50mph.
• Unnecessary Idling: An idling engine consumes resources without covering any distance. Turning off the engine if stopped for more than a minute saves money and reduces emissions.

Monitoring these behaviours and providing targeted driver training is a proven solution for cutting costs.

Vehicle maintenance and selection

A well-maintained vehicle is an efficient vehicle. Simple, regular checks are crucial for optimising performance and reducing waste. Ensure your vans have correctly inflated tyres, as under-inflation increases rolling resistance and increases consumption. Regular servicing keeps the engine running cleanly and efficiently, preventing minor issues from impacting your bottom line. Furthermore, always select the right van for the job; an oversized or overpowered vehicle will consistently waste resources on every journey.

Route planning and job management

Wasted miles are wasted money. Inefficient routing, backtracking, and getting caught in traffic all contribute to higher consumption. Every unnecessary mile has a tangible cost, which can be quantified using metrics like the official government advisory fuel rates, making route optimisation a critical cost-saving measure. Modern route optimisation software eliminates guesswork by calculating the most efficient path for each day’s jobs, considering traffic, distance, and delivery windows. This technology not only saves on fuel but also improves productivity and customer service. See how Fleetmaxx’s Vehicle Tracking can help monitor driver behaviour and improve your fleet’s overall efficiency.

Streamlining fuel management with modern solutions

Choosing a fuel-efficient van is a crucial first step, but how you manage your ongoing fuel spend is where significant savings and efficiencies are truly unlocked. For many UK businesses, the traditional ‘pay and reclaim’ model is an administrative bottleneck, costing valuable time and money. Relying on drivers to collect paper receipts, which are then manually processed for expense claims and VAT reclaim, is an outdated and inefficient system.

Modern solutions offer a streamlined, cost-effective alternative, transforming a chaotic process into a controlled, transparent operation. By moving away from cash and personal credit cards, you can gain complete control over one of your largest operational expenses.

The problem with cash and credit cards

When drivers pay for fuel using cash, company credit cards, or their own money, businesses lose direct control over spending. This method creates several challenges:

• Administrative Overload: Your finance team is left chasing a mountain of faded receipts, cross-referencing them with journeys, and manually calculating VAT. This is a time-consuming task prone to human error.
• Lack of Control: Company credit cards can be used for unauthorised purchases, from snacks to services, with little oversight until the statement arrives.
• HMRC Compliance Risk: Producing accurate, HMRC-compliant reports for VAT reclaim from a collection of individual till receipts is complex and can lead to costly mistakes or missed claims.

How business fuel cards provide control

As a trusted partner to UK businesses, we see firsthand how fuel cards provide the ultimate solution to these problems. Instead of dozens of receipts, you receive a single, consolidated, HMRC-approved weekly invoice. This simplifies accounting and guarantees you can reclaim every penny of VAT you’re entitled to. Furthermore, you gain robust control over spending by setting specific limits and restricting purchases to fuel and other approved items, eliminating misuse and giving you complete peace of mind.

Gaining full visibility over fuel spend

The benefits extend beyond simplified paperwork. Our business fuel cards come with a powerful online management portal, giving you a real-time, comprehensive overview of all transactions across your fleet. You can easily track expenditure by individual driver, vehicle, or region, allowing you to identify trends, spot inefficiencies, and make data-driven decisions to reduce costs further. This level of visibility turns fuel management from a reactive chore into a proactive strategy for saving money.

Ready to simplify and save? Compare our range of Business Fuel Cards.

The future of fuel: Preparing your fleet for tomorrow

Choosing a fuel-efficient van today is a smart financial decision, but preparing for the regulatory and technological shifts of tomorrow is essential for long-term success. The landscape of fleet management is changing rapidly, moving away from a total reliance on fossil fuels. Planning now ensures your business can navigate this transition smoothly, reducing future costs and maintaining operational efficiency. As your trusted partner, Fleetmaxx Solutions is here to help you build a resilient, future-proof strategy.

The transition to electric vehicles (EVs)

With the UK’s 2035 deadline for the end of new petrol and diesel van sales approaching, electrification is no longer a distant concept but a core business consideration. While the initial investment can seem high, the Total Cost of Ownership (TCO) for EVs is often significantly lower. Businesses benefit from reduced running costs, lower maintenance bills, and exemption from congestion charges. A successful transition, however, depends on a robust charging infrastructure, both at your depot and for drivers at home.

The role of transitional fuels like HVO

For many fleets, an immediate switch to 100% electric isn’t practical due to range, payload, or operational demands. This is where transitional solutions like Hydrotreated Vegetable Oil (HVO) provide an immediate and powerful impact. HVO is a drop-in diesel replacement that can be used in your existing vehicles without any modification, cutting net greenhouse gas emissions by up to 90%. It’s a practical step to improve your fleet’s sustainability today, without the need for major capital investment.

Building a Mixed-Fuel Fleet Strategy

The future for most UK businesses is not a single-source solution but a mixed-energy fleet. Your operations might require a combination of efficient diesel vans for long-haul routes, HVO for heavy-duty work, and electric vehicles for urban deliveries. Managing this complexity requires a partner who understands every type of fuel and energy source. Fleetmaxx provides comprehensive solutions, from traditional fuel cards to EV charging payment systems, all designed to keep your entire fleet moving for less.

Let us help you build a future-proof fuel strategy that saves you money and prepares you for tomorrow. Talk to our experts today.

Steve Clarke – Marketing Manager

Frequently asked questions about fleet fuel efficiency

What is the main difference between regular diesel and premium diesel for an HGV?

The primary difference lies in the additive package. Premium diesel contains detergents and other agents designed to clean your HGV’s engine, injectors, and fuel system. This results in a more complete combustion process, which can lead to slightly improved fuel efficiency and reduced emissions. While the upfront cost per litre is higher, these additives can also help reduce long-term maintenance costs and prolong engine life, making it a worthwhile consideration for high-mileage fleets.

Can using a fuel card really save my business money on fuel?

Absolutely. A fuel card is a powerful tool for cutting your business’s fuel costs. Rather than paying fluctuating pump prices, our cards often provide access to fixed weekly wholesale prices, protecting you from daily price hikes and saving several pence per litre. Furthermore, you receive consolidated, HMRC-approved invoices, which dramatically reduces administration time and simplifies the process of reclaiming VAT. This delivers significant, tangible savings directly to your bottom line.

Is HVO fuel compatible with all of my fleet’s existing diesel vehicles?

While Hydrotreated Vegetable Oil (HVO) is designed as a “drop-in” replacement for diesel, it is not universally compatible with every vehicle. Many modern diesel engines, particularly Euro 6 models, are approved for HVO use without any modification. However, it is essential to check with your vehicle manufacturer to confirm compatibility for each specific van model in your fleet. Using HVO in an unapproved vehicle could potentially void your warranty, so always verify first to protect your investment.

How do I start the process of reclaiming VAT on my fleet’s fuel spend?

To reclaim VAT on fuel, you must keep valid VAT receipts for all purchases and ensure the fuel is used for business purposes. With a fuel card from a trusted partner like Fleetmaxx Solutions, this process is simplified. You receive a single, consolidated, HMRC-approved invoice with all the necessary details. This removes the hassle of collecting individual receipts and ensures you have the correct documentation ready for your quarterly VAT return, saving significant administrative time and effort.

What’s more important for reducing fuel costs: a fuel-efficient vehicle or a good driver?

Both are crucial, but driver behaviour often has the more immediate and significant impact. A fuel-efficient van provides an excellent baseline, but a driver with poor habits—such as harsh acceleration, speeding, and excessive idling—can easily negate any potential savings. A skilled, well-trained driver can improve the efficiency of any vehicle by up to 15%. Therefore, investing in driver training and monitoring provides one of the most effective returns for reducing your fleet’s fuel consumption.

How can I manage fuel costs if my fleet includes both petrol vans and electric cars?

Managing a mixed fleet requires a unified solution. The most efficient method is to use a charge card that accommodates both traditional fuel and electric charging. Solutions like our Fleetmaxx EV card allow drivers to pay for petrol, diesel, and public EV charging on a single card, through one account. This provides you with one consolidated invoice for all your energy spend, simplifying administration and giving you a complete, clear overview of your total running costs across your entire fleet.