Redex AdBlue 5L: What It Is and What the Listing Says
At a glance
- What it is: A 5 litre pack of AdBlue with an easy-pour spout, for diesel cars with an exhaust SCR system. It is not a fuel additive and does not go in the fuel tank.
- Key facts: Redex claims it reduces NOx emissions by up to 80%; 5 litres (5 kg pack); statutory guarantee only; £13.79 (B&Q listing, third-party seller).
- Suits: Owners of diesel cars that need AdBlue topping up.
- Skip if: Your car does not have an AdBlue tank, or you expect it to improve fuel economy.
We haven’t tested this product ourselves. This page summarises one B&Q listing, checked 19 October 2026. Our earlier page called it an additive to add to fuel. That was wrong, and we have corrected it.
Specifications
| Specification | Detail | Source |
|---|---|---|
| Product | Redex AdBlue with spout, 5 litre (B&Q listing, sold by FIXRA) | [1] |
| Claim | “Reduces NOX emissions by up to 80%” | [1] |
| Pack | 5 litres; pack weight 5 kg; easy-pour spout | [1] |
| Guarantee | Statutory | [1] |
| Price | £13.79; sold online only by a third-party seller | [1] |
| Standard (ISO 22241), usage notes | Not on the page we opened; not verified | n/a |
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 (often near the fuel filler or in the boot). Wipe up spills, and store it as the label says.
Questions people ask
Is AdBlue a fuel additive?
No. It is a fluid for the exhaust SCR system. Carlube, another maker, describes its AdBlue as a reducing agent for SCR exhaust systems [3].
Will it improve my mpg?
The Redex listing claims lower NOx emissions only [1]. It does not claim better fuel economy.
Which cars need it?
Diesel cars with an SCR system, usually Euro 6 [3]. Check the handbook.
Alternatives
- Carlube AdBlue: See our separate page.
- Fuel additives: See our fuel additives hub.
Our verdict
Based on the evidence, this is a standard AdBlue refill sold with a spout. We could not confirm the ISO standard from the page we opened. This is a research summary, not a test result.
Sources
- Redex AdBlue With Spout, 5 Litre, B&Q (UK retailer listing, third-party seller), diy.com. 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.
- AdBlue 5L (CAB500), Carlube, carlube.co.uk. The page shows no date. Checked 19 October 2026.