Website readiness profile · Snapshot 23 October 2026
castrol.com
castrol.com's public homepage, certificate and DNS checked against 31 practices and compared with 703 Cars & Automotive sites.
- Readiness index
- 71/100
- Ahead of
- 60%
- Practices observed
- 22/31
- Popularity band
- Top 50K
Cars & Automotive median 66
of measured Cars & Automotive sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: castrol.com. Thin bar: Cars & Automotive peer median.
Enable
100/100
Peers 84
Harden
78/100
Peers 57
Accelerate
30/100
Peers 65
Recover
100/100
Peers 14
Priority fixes for castrol.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
HTML compressed
Observed: The homepage HTML (142 KB) was delivered without gzip, Brotli or zstd compression.
Why it matters: Compression usually shrinks HTML several times over, so the first bytes of the page arrive sooner on slow connections.
What to do: Enable Brotli or gzip for text responses (HTML, CSS, JavaScript, JSON, SVG) at the CDN or origin.
On Amazon CloudFront: Enable Compress objects automatically on the cache behaviour.
95% of Cars & Automotive peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.
Guide: How to Set a Website Performance Budget That Teams Can Keep
Priority 2 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for 300 seconds, short of the 30-day benchmark.
What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
On Cloudflare: Use Cache Rules to set edge and browser TTLs for static file paths.
55% of Cars & Automotive peers do this.
Priority 3 · Accelerate
Modern image formats in use
Observed: The homepage had 23 images and none used WebP or AVIF.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
On Cloudflare: Cloudflare Polish can convert images to WebP.
47% of Cars & Automotive peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format
Priority 4 · Accelerate
Offscreen images lazy-loaded
Observed: The homepage had 23 images and none used loading="lazy".
What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.
64% of Cars & Automotive peers do this.
What castrol.com already does well
Practices fewer than half of Cars & Automotive peers use.
- Nameservers spread across providersNameservers spread across Amazon Route 53 and Cloudflare.14% of peers
- Referrer-Policy setReferrer-Policy present.26% of peers
- Content Security Policy presentContent-Security-Policy present.31% of peers
What we saw
- Homepage checked
- https://www.castrol.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- DigiCert, 198-day validity, expiring 2027-03-19
- CDN or edge
- Amazon CloudFront
- Platform or framework
- Adobe Experience Manager
- DNS operators
- Amazon Route 53, Cloudflare
- HSTS
- max-age 365 days, includeSubDomains
- DMARC policy
- p=reject
- Homepage HTML
- 142 KB, uncompressed
- Images on homepage
- 23 (jpg 16, svg 6)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 9
Observed 22
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/2 negotiated
- No render-blocking scripts in <head>
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
- Nameservers spread across providers
Own castrol.com?
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Live status for this site: Status Is Down: castrol.com. This profile covers configuration only.