Keep original CS75 and PLUS results separate
A search result headed CS75 may describe the original family, a facelift or one of several PLUS generations. Even when the engine displacement looks familiar, the whole vehicle and powertrain specification may differ. Record the original version description before using any consumption number in a customer comparison. A current regional brochure is not a universal historical specification.
Use the CS75 and CS75 PLUS identification guide if the offer is ambiguous. Keeping the families separate prevents a newer PLUS rating being attached to an older original CS75 merely because both appear in the same search or supplier list.
Identify the measurement and units
Litres per 100 km and kilometres per litre express the same type of relationship in opposite directions: lower is better for the former, higher for the latter. To convert km/L into L/100 km, divide 100 by the km/L value. State whether a figure is a published test rating, dashboard reading or calculation from fuel purchases.
Do not compare different test cycles as if they were the same experiment. Keep each source and test basis beside the number. A headline that omits those details may be a useful question for the seller, but it is not enough for a defensible economy comparison.
Ask for a repeatable road-use record
For a candidate demonstration, request distance, route type, traffic conditions, payload, climate use and the method used to determine fuel consumed. A recently reset display over a short favourable drive can misrepresent the customer’s normal operation. Longer observation can be useful, provided the start and end conditions and records are consistent.
The purpose is not to impose a laboratory test on a seller. It is to obtain enough context to understand the evidence. If only a dashboard photograph is available, label it accordingly and avoid presenting the result as independently measured economy.
Use a worked example without inventing a CS75 result
Suppose a hypothetical vehicle uses 45 litres over 500 km. The calculation is 45 divided by 500, multiplied by 100: 9 L/100 km. At an assumed fuel price of 1.20 currency units per litre, the fuel cost is 10.80 per 100 km. These inputs are arithmetic examples, not CS75 test results or current fuel prices.
For an actual offer, replace them with the relevant observations and destination tariff. Keep preparation, servicing and tyres separate. The ownership-cost worksheet shows how fuel fits into a wider budget without making it the only selection criterion.
Investigate an unexpected result before judging reliability
High reported fuel use can reflect traffic, short trips, idling, driving style or a measurement problem. It can also justify a condition review when the observation is consistent and unexplained. Ask a competent inspector to assess relevant faults, tyres and service condition rather than diagnosing an engine from an economy screenshot.
The engine inspection guide covers the broader evidence. Record symptoms and test context separately from any proposed cause. A buyer should not approve a repair solely because someone assumes that a particular component must explain the fuel consumption.
Compare the customer’s actual alternatives
A 1.5T versus 2.0T discussion should include the exact generation, gearbox, load requirement and condition. An engine-size label alone does not establish which candidate will use less fuel on a particular route. Make the comparison with equivalent duty assumptions and explain where supporting data is missing.
For a dealer supplying both urban and long-distance customers, maintain separate use cases. One universal economy claim can obscure important differences in operation. The goal is to show how a documented candidate fits a customer’s routine, not to pick a winner from unrelated brochure figures.
For a RAV4 alternative, the identified-vehicle comparison keeps petrol, hybrid and plug-in operating records separate instead of mixing energy use into an unexplained total.
A mixed-route example to question
Consider a seller who supplies a motorway dashboard reading while your customer mostly makes short urban trips. The number may be authentic yet poorly matched to the decision. Ask for a more relevant observation or keep a separate urban budget assumption. Do not average the two without explaining their origins. If the customer later asks why the estimate changed, the record should show that the operating pattern changed, rather than suggesting that the vehicle’s official specification was revised.
What to send with an economy-focused enquiry
Provide expected daily distance, traffic pattern, passenger or luggage load and fuel available at the destination. State the model family, accepted years and whether new or used candidates are wanted. Ask for the original powertrain specification and any usable consumption evidence for the actual offer.
When presenting the result, separate published ratings, observed data and planning assumptions. Keep the route and units visible so the customer can assess relevance. If the evidence is limited, a range of clearly labelled budget scenarios is more honest and useful than a precise number that no one can reproduce.
