Carlube AdBlue: What It Is and What the Maker Says
At a glance
- What it is: AdBlue, a reducing agent for the exhaust SCR system of modern diesel vehicles, sold by Carlube. It is not a fuel additive and does not go in the fuel tank.
- Key facts: Produced to ISO 22241; for diesel Euro IV, V and VI engines with SCR; the page names a 5L pack but shows a “500ml” product code (Carlube).
- Suits: Diesel owners whose cars have an AdBlue tank.
- Skip if: You expect better fuel economy; the maker’s page makes no such claim.
We haven’t tested this product ourselves. This page summarises Carlube’s product page, checked 19 October 2026. Our earlier page called this a fuel additive that improves economy. That was wrong, and we have corrected it.
Specifications
| Specification | Detail | Source |
|---|---|---|
| Product | Carlube AdBlue 5L (product code listed as CAB500) | [1] |
| What it does | Reducing agent for Selective Catalytic Reduction (SCR) exhaust systems, to reduce nitrogen oxide emissions | [1] |
| Standard | ISO 22241 | [1] |
| Vehicles | Diesel Euro IV, V and VI engines with SCR | [1] |
| Pack size | The title says 5L but the product code says 500ml; the page does not explain | [1] |
| Spout | Not described; a link points to a spout version at another seller | [1] |
| Price | Shown as $14.99 on Carlube’s UK store page, which looks like a currency error; not verified | [1] |
| Concentration, storage, warnings | Not on the page; it links to a safety data sheet we did not open | [1] |
What owners report
We have not reviewed owner feedback for this product.
Known issues and safety
Recall check: we searched GOV.UK product safety alerts, reports and recalls (Office for Product Safety and Standards) for “adblue” on 19 October 2026 and found no results [2]. Check the list again for the exact product.
Never pour AdBlue into the fuel tank. Find the AdBlue filler in your handbook. Read the safety data sheet and storage advice on the pack. Because the pack size and price on the page conflict, check both before you order.
Questions people ask
Is it a fuel additive?
No. Carlube describes it as a reducing agent for SCR exhaust systems [1].
Which engines need it?
Carlube lists diesel Euro IV, V and VI engines with SCR [1]. Check your handbook.
Does it save fuel?
The maker’s page makes no fuel economy claim [1].
Alternatives
- Redex AdBlue: See our separate page.
- Fuel additives: See our fuel additives hub.
Our verdict
Based on the evidence, this is a standard ISO 22241 AdBlue for SCR diesels. The maker’s page is unclear on pack size and price, so check before buying. This is a research summary, not a test result.
Sources
- AdBlue 5L (CAB500), Carlube, carlube.co.uk. The page shows no date. Checked 19 October 2026.
- GOV.UK search of product safety alerts, reports and recalls, Office for Product Safety and Standards, gov.uk. Searched 19 October 2026.