Section 1: Purpose and Scope
Carreb provides indicative vehicle insights focused on estimated cost of ownership, emissions performance, and potential savings for Australian consumers considering new vehicles. We combine official certification data with curated public sources and proprietary modelling to present consistent, consistent outputs for new light vehicles available in Australia.
This page explains our data sources, standards, methodology, and limitations. It should be read together with our Terms of Service (in particular Sections 5, 21–25, and 29) and Privacy Policy.
Section 2: Certification Data and Standards
We rely primarily on Australian certification data for fuel consumption and CO₂ emissions generated under laboratory test procedures referenced by the Australian Design Rules (ADRs) and harmonised UN Regulations as adopted in Australia. These laboratory results underpin fuel consumption and CO₂ labels and vehicle certification in Australia.
Laboratory Data and On-Road Variation. Laboratory test results are produced under controlled, standardised conditions. They provide a consistent basis for assessment across vehicles but will differ from on-road driving outcomes. On-road fuel consumption and emissions depend on driving style, traffic conditions, terrain, weather, vehicle load, maintenance, and other factors.
On-Road Variation. Independent Australian and international programs (based on Euro 6d RDE concepts and similar methodologies) show that on-road results often differ from laboratory figures. Our platform displays certified laboratory data to maintain consistency unless expressly stated otherwise.
Section 3: Emissions and Energy Methodology
Tailpipe CO₂ / Fuel Consumption / EV Energy Use: We present grams per kilometre (g/km), litres per 100 kilometres (L/100 km), and watt-hours per kilometre (Wh/km) as published for certification purposes. We do not convert between NEDC, WLTP, or EPA test cycles unless expressly disclosed. Where a vehicle has been certified under multiple cycles, we display the cycle applicable to the Australian market.
Upstream Electricity Emissions (Scope 2): For battery electric and plug-in hybrid vehicles, we calculate indicative upstream emissions using the latest available National Greenhouse Accounts (NGA) Factors for grid electricity. We may also show indicative regional intensity based on AEMO CDEII (Clean Energy Domestic Emissions Intensity Index) or similar frameworks.
These grid-intensity values are not real-time unless expressly stated. They are updated when official factors are revised by the relevant government authority. Users can customise their energy source in MyGarage (including home solar or 100% renewable plans) to receive more tailored indicative emissions results.
Section 4: Cost of Ownership (COO) and Monthly Save
Uniform Methodology: Our CORE™ modelling applies a uniform, consistent method across all vehicles in the database, regardless of brand, manufacturer, or fuel type. No manufacturer, dealer, or sponsor influences the methodology or its outputs.
Inputs include:
- Verified state-based variables: fuel costs, electricity tariffs, registration fees, and CTP insurance (by state/territory).
- Standardised assumptions: indicative finance rates, insurance estimates, servicing costs, and depreciation models.
- Your MyGarage inputs: km/year, energy source, finance terms, insurance, dealer quotes, and other details you choose to enter.
What "Monthly Save" Means:
Definition. The estimated difference between your current vehicle's estimated monthly total cost and the selected vehicle's estimated monthly total cost, as modelled by our cost-of-ownership engine.
Refine in MyGarage. Set your current vehicle, usage (km/year), energy tariffs, finance terms, and insurance to tailor the estimate to your circumstances.
Default Baseline (If None Set). If you have not set a current vehicle, we apply a category-specific annual km default derived from Australian Bureau of Statistics Survey of Motor Vehicle Use (SMVU) data. This default is a general proxy only and may not reflect your individual circumstances. Adjust to your situation in MyGarage.
Proxies Where Needed. If you do not provide certain inputs (e.g., insurance, finance terms), we apply standardised proxies or indexed averages until you override them. Energy and fuel prices may reflect public monitoring datasets (e.g., regulator reports or government price trackers) or your inputs. If no data is available, we use representative proxies and clearly indicate where assumptions have been applied.
Section 5: Resale Value Estimates (Indicative Only)
What It Is. An industry-average estimate used solely for indicative purposes within estimation features (e.g., CORE™ Rating, True Value, Full Picture views). It is not a vehicle valuation, market appraisal, trade-in offer, credit assessment, or an offer to buy or sell.
How It Is Derived (Summary). Modelled retention patterns over approximately 5 years by vehicle segment and powertrain type, normalised to category-specific usage assumptions derived from ABS data, with periodic recalibration to current market conditions.
What We Do Not Model. Individual vehicle condition; factory options or aftermarket accessories; repair or ownership history; local supply and demand; dealer buyback or guaranteed future value programs; or market timing.
Your Control. You can override the default resale estimate in MyGarage. We may display a range where data is variable. Our method may evolve as better data becomes available.
Section 6: Data Provenance and Refresh Cadence
We source data from the following categories:
- Government and regulator portals: certification and label data; National Greenhouse Accounts Factors; AEMO indices; state and territory fee schedules.
- Public and industry datasets: market and fuel price monitoring; insurance and servicing benchmarks.
- Manufacturer specifications: where consistent with certification data and publicly available.
We maintain an internal source register with retrieval dates and refresh core datasets when official updates are released or when material changes are identified. This page shows a "Last Updated" date reflecting the most recent review of this methodology description.
Section 7: Handling Gaps, Outliers and Harmonisation
Missing Data. If a data field is unavailable for a vehicle, we may: (i) omit the metric; (ii) display a range or estimate with a clear indicator; or (iii) use a clearly marked proxy with appropriate disclosure.
Outliers. We may flag and review statistical outliers against cohort benchmarks to ensure consistency. Flagged vehicles may be subject to additional validation before publication.
Test Cycle Harmonisation. Unless expressly noted, we do not cross-convert between NEDC, WLTP, and EPA test cycles. We present the certified cycle applicable to the Australian market to preserve consistency.
Section 8: Independence, Advertising and Sponsorship
Carreb may accept advertising or sponsorship in the future. However, no advertiser, sponsor, manufacturer, dealer, or commercial partner has any control over our algorithms, rankings, cost-of-ownership models, emissions calculations, savings estimates, or CORE™ Ratings. Any paid placements or sponsored content will be clearly and prominently labelled as such.
Our methodologies and outputs remain entirely independent of commercial relationships. This independence is fundamental to our platform and will not be compromised.
Section 9: Pricing and Offers
Vehicle prices, dealer offers, driveaway estimates, and incentives displayed through the Services are indicative only and are subject to change based on dealer location, available stock, fees, factory options, accessories, promotional periods, and timing. These are not offers or commitments by Carreb or any dealer. Confirm all details directly with the relevant dealer before making any decision or commitment.
Section 10: Data Accuracy, Limitations and User Responsibility
We consider our sources reliable at the time of collection, but we do not guarantee the completeness, accuracy, timeliness, or continued availability of any data. All results are indicative, modelled estimates that may change without notice as data sources are updated, errors are corrected, or methodology is refined.
You are responsible for updating MyGarage to reflect your actual circumstances. The accuracy and relevance of your results depend significantly on the quality and completeness of the inputs you provide.
This page provides general information only and does not constitute financial, legal, tax, environmental, or any other form of professional advice. Seek independent professional advice before acting on any information provided through the Services.
Section 11: Methodology Evolution and Recalibration
We continually improve our data pipelines, models, assumptions, weighting coefficients, and scoring systems (including the CORE™ Rating methodology). We may update inputs, assumptions, or calculation methods and may recalibrate historical outputs to reflect improved data or refined methodology. Where a paid feature is materially reduced as a result of methodology changes, our Terms of Service (Section 14) applies.
Significant methodology changes will be documented in a change log accessible via this page.
Section 12: Source Recency and Change Log
This page displays a "Last Updated" date and maintains a summary change log of significant methodology or data source changes. To request a correction, report an error, or submit a data takedown request, please use the Contact Us page on our website, providing the specific data point, the source, and the retrieval date if available.
Section 13: Right to Reply
If a manufacturer, dealer, data supplier, industry body, or user believes that any data point, estimate, or CORE™ Rating is materially inaccurate or misleading, they may submit a Right to Reply request via the Contact Us page. We will review all submissions in good faith. See our Terms of Service, Section 23, for full details.
Section 14: Contacting Carreb
Use the Contact Us page on our website for all enquiries, including data corrections, methodology questions, Right to Reply requests, security disclosures, and complaints.
Section 15: Australian Consumer Law Notice
Nothing in this page excludes, restricts, or modifies your non-excludable rights, guarantees, or remedies under the Australian Consumer Law (Schedule 2 of the Competition and Consumer Act 2010 (Cth)).
This document forms part of Carreb's legal and informational framework and should be read together with the Terms of Service, Privacy Policy, and FAQ. All outputs described in this document are modelled, indicative estimates only.