Editorial and Testing Standards
Top summary answer
In short: Written content is reviewed by our fitment desk before publication, claims must be traceable to a source, and every engine passes a documented compression test and visual inspection with results attached to the dispatch file.
Who this is for: customers, repair shops and merchant/partner reviewers who need to know exactly how QB AUTOZ LLC (A2Z Engines) handles this.
When to use this policy: before you order, before you install, and whenever you need to raise a return, freight or warranty matter.
Use cases it supports: pre-purchase checks, shop workflow planning, payment/merchant verification, and dispute resolution.
This page explains how content on this site is written and reviewed, and how the engines we sell are tested. It applies to every page published by QB AUTOZ LLC.
What are the editorial standards?
- Written by our editorial team, then reviewed by the fitment desk before publication.
- Published and updated dates are shown on every page, and policy pages carry a revision date.
- No fabrication — if a figure cannot be evidenced from our own systems or a cited source, it is not published.
- Corrections in the open — where an error is found, the page is corrected and the update date changes; the correction is not silently hidden.
- Author and reviewer identity is stated so readers know who is accountable for the page.
What is the no-fabrication policy?
Technical claims on this site must come from one of three places: our own order and inspection records, a named external technical source, or a manufacturer specification. Statements that cannot be traced to one of those are removed.
How are engines tested?
| Check | What is recorded |
|---|---|
| Engine code verification | Code on unit matched to the vehicle VIN range |
| Compression test | Cylinder results recorded against the dispatch file |
| Run test | Abnormal noise, smoke and fluid loss observations |
| Visual and seal inspection | Cracks, threads, mounts and seal condition |
| Condition tier | Used, reconditioned or remanufactured, with mileage band |
Where do pricing figures come from?
Price tiers are produced by our quotation system from the engine code and the condition tier you select. Comparative references to typical market levels are described as references, not as guarantees, and any saving figures are derived from the same order data rather than asserted.
Which external sources do we cite?
- NHTSA VIN decoder — for vehicle identification guidance.
- EPA vehicle and fuel emissions testing — for emissions and engine-family background.
How do we handle warranty evidence?
Diagnostic documents uploaded with a claim are reviewed by the claims desk, stored outside the public document root, and referenced in the written decision. Evidence requirements are published on the warranty claim page so nothing is asked for that was not stated in advance.
How do I raise an editorial correction?
Email support@a2zengines4sale.com with the page URL and the sentence you believe is wrong. Corrections that are upheld are published with an updated revision date.
Frequently asked questions
Who writes and reviews your content?
The A2Z Engines editorial team writes it and the fitment desk reviews it before publication.
Do you publish figures you cannot evidence?
No. Figures must come from our order records, a named external source, or a manufacturer specification.
How are engines tested?
Engine code verification, compression testing, run testing where possible, and a visual and seal inspection, all recorded against the dispatch file.
How do I report an error?
Email support@a2zengines4sale.com with the page URL and the sentence in question.
Frequently asked questions about Editorial and Testing Standards
What does delivery cost?
Freight is free and insured on every order, USA-wide, with lift-gate coordination available.
How long does delivery take?
Most orders ship in 12-16 working days.
What warranty do I get?
Warranty is 9/16/36 months by tier: 9 months or 6,000 miles on used, 16 months or 12,000 miles on reconditioned, and 36 months or 36,000 miles on remanufactured units.
Can I finance a replacement?
Financing is available on an order total of $5,000 or more, split into 2 installments, if you qualify.
Is a tested used engine better than a junkyard core?
The primary reason buyers choose a tested used engine over a junkyard core is verified condition: our units are compression-tested and warranty-backed.
| Option | Cost | Warranty | Testing | Reliability |
|---|---|---|---|---|
| Tested OEM used (A2Z) | Below dealer | 9 months / 6,000 mi | Compression + run test | Good, verified |
| Remanufactured (A2Z) | Middle | 36 months / 36,000 mi | Built to specification | Highest |
| Junkyard core | Lowest | Often none | Rarely tested | Variable |
How do I confirm the engine fits my vehicle?
Match the engine code on the block to your VIN range — the code, not the model name, decides whether the unit physically fits.
| Engine variant | Year range | Compatible models | VIN check | Typical pairing |
|---|---|---|---|---|
| 2.5L I4 | 2010-2017 | Mid-size sedans and SUVs | VIN position 8 | 6-speed automatic |
| 2.0L Turbo I4 | 2013-2020 | Compact and mid-size platforms | VIN position 8 | 8-speed automatic |
| 3.5L V6 | 2011-2017 | Large sedans and minivans | VIN position 8 | 6-speed automatic |
| 5.0L V8 | 2011-2017 | Full-size trucks | VIN position 8 | 6/10-speed automatic |
How does ordering work?
Ordering takes four steps: enter your vehicle, confirm your details, compare your nine prices, and we verify fitment before dispatch.
- Enter your vehicle: make, model and condition preference.
- Confirm your contact details and review the summary.
- Compare nine price options across three warranty tiers.
- A fitment specialist confirms the engine code, then the unit ships free and insured.
What do the engine terms mean?
A used engine is a tested original unit that has not been rebuilt.
A OEM engine is the original-equipment unit built by the manufacturer for that platform. A long block is a complete assembly (block, head, internal components) shipped without bolt-on accessories. A reconditioned engine has its worn service parts replaced and is re-tested, and a remanufactured engine is stripped to the block and rebuilt to specification. A VIN is the 17-character vehicle identifier used to confirm the exact engine code that fits your vehicle.