How a DriveScore is made.
DriveScore is DriveScored’s transparent 0–100 comparison signal, calculated from category-specific product evidence, owner satisfaction, and value. It does not choose the editorial winner. Editorial rank answers which product best fits the job most buyers need done; DriveScore exposes the supporting strengths, tradeoffs, and evidence coverage behind that decision.
Methodology updated August 30, 2026.
What we refuse to do
Category-specific rubrics
A jump starter and a microfiber towel should never be scored on the same axes. Neither should a dash cam and a ceramic coating. So they aren’t. Every product is scored on four category-specific dimensions (three for sun shades and wiper blades) plus Value and Owner Satisfaction, which apply everywhere. A representative sample:
Dash Cams
- Video Quality - night-time plate legibility, HDR, resolution that’s real not just labeled
- Parking Mode - buffered recording, hardwire support, battery protection
- Reliability & Heat - supercapacitor vs. lithium, survival in a hot cabin
- App & GPS - Wi-Fi transfer, app quality, GPS stamping
Portable Jump Starters
- Cranking Power - real cranking amps and engine-size support, not “peak amps” marketing
- Capacity & Charging - mAh, USB-C PD output, starts per charge
- Safety Features - spark-proof, reverse-polarity-protected clamps
- Build Quality - clamp and case durability
DIY Ceramic Coatings
- Durability - realistic months/years, weighted against over-stated claims
- Ease of Application - high-spot forgiveness, flash-time window
- Gloss & Beading - hydrophobic performance, sheeting, shine
- Value - coverage per kit
Wireless CarPlay Adapters
- Connection Reliability - reconnect consistency, dropout resistance
- Latency - map and touch responsiveness, boot time
- Compatibility - breadth of supported cars and phones
- Ease of Setup - plug-and-play vs. fiddly pairing
Floor Mats & Liners
- Coverage & Fit - laser-fit edge coverage vs. universal gaps
- Material Quality - TPE flexibility, no curl, no chemical smell
- Containment - raised edges, deep channels that trap water and mud
- Ease of Cleaning - hose-off, non-staining
EV Home Chargers
- Charging Speed - amperage delivered, matched against real circuit capacity
- Smart Features - app scheduling, load management, energy monitoring
- Install Flexibility - plug-in vs. hardwire, cable length, connector
- Reliability - weatherproofing, UL listing, fault handling
Decision-critical capabilities use structured specifications where comparable data exists: resolution and channels for dash cams, bidirectional control and fees for OBD2 scanners, boot time and platform support for wireless adapters, and declared suction, power, runtime, and filtration for car vacuums. Qualitative outcomes remain text-based and are never inferred from an unrelated spec.
Our fitment policy — what we do and don’t know
The biggest anxiety in buying car parts is “will it fit mycar?” Most sites either ignore this or fake certainty. We don’t. Every product carries a fitment chip drawn from a fixed vocabulary, and when a listing is sold in vehicle-specific variants we say so plainly rather than guess:
- Fits: Universal — works on essentially any vehicle.
- Check fit for your model — sold in multiple variants; confirm yours on the retailer page. This is our honest default when we can’t verify universal fit.
- Model-specific — the listing covers a stated set of vehicles, which we name.
- Depends on — fit hinges on a spec you can check (connector type, bulb size, factory CarPlay, etc.).
A visible “double-check this” is more useful than false confidence. We would rather tell you to confirm than send you a part that doesn’t fit.
The composite formula
DriveScore =
0.25 × Owner Satisfaction
+ 0.20 × Value
+ 0.55 × (average of category-specific dimensions)The result is rounded to an integer between 0 and 100. We also publish the sub-scores on every product page so you can interrogate the result. If a product scores 92 overall but a 65 on Build Quality and a 99 on Owner Satisfaction, you can see exactly where the gap is.
Try the calculator yourself
Move the sliders. Every product on DriveScored resolves to one composite score using these exact weights. No magic numbers.
Composite score
Owner Satisfaction is weighted 25%, Value 20%, and the category-specific dimensions share 55% equally: four in most categories (the jump-starter rubric is shown here), three for sun shades and wiper blades. Real product scores compute exactly this way - every breakdown row on a product card is one of these dimensions.
What the DriveScore decides — and what it doesn’t
The DriveScore does not pick the winner. Rankings on this site are editorial: a human decides which product best fits the job most buyers in that category are actually doing, and the score is published alongside as a supporting signal you can check us against.
We keep editorial rank separate because even a deterministic score cannot know every buyer’s job. Structured specifications now replace prose-keyword matching for the decision-critical fields we can compare honestly, while qualitative outcomes still use researched product evidence. A narrow, lower-cost product can therefore earn a strong DriveScore without becoming the best overall recommendation.
So when you see a #2 or #4 product carrying a higher DriveScore than the pick above it, that is not an error and we don’t hide it. It usually means that product is excellent at something narrower. The verdict text on the pick explains the call.
What we don’t claim
DriveScored does not hands-on test products. Every recommendation is research-based: manufacturer documentation and specifications, safety and government sources, and aggregated owner feedback, read alongside community discussion. The sources, the generation check and what an “Updated” date means are set out in how we research, which also carries a dated corrections log.
We don’t accept paid placements. Affiliate commissions fund this site, but the recommendations are the same recommendations we’d give a friend — we’ve flagged multiple products as “skip this” precisely because the recommendations don’t bend toward higher-priced products for commission.
How the score gets updated
The DriveScore is regenerated whenever a product’s underlying data changes — rating, review count, pros/cons, specs, tier, or derived sentiment. This is automated, so the score on a product page reflects the most recent data we have.
B+ ≥77 · B ≥72 · B− ≥67
C+ ≥62 · C ≥55 · D <55