How we check the numbers

This site is mostly numbers: mpg, electric range, credit amounts, install quotes, payback years. A number is only worth reading if you can see where it came from. This page is the standard we hold every page to, written so you can check whether we actually meet it.

Nothing goes on a page without a publisher behind it

Every cost, incentive and efficiency figure on What Is The Hybri traces back to a body that produced the number, not to a blog that repeated it. Each guide that makes those claims carries a visible source block at the bottom listing exactly which publishers it leans on and what it takes from each one. If a figure has no source we can point at, it does not go on the page.

The standing register is below. Individual pages cite the subset that applies to them.

SourceWhat we take from it
Fuel Economy Guide and vehicle mpg database
U.S. Department of Energy and U.S. Environmental Protection Agency
mpg, MPGe, electric range and annual fuel cost estimates by model year and trim
Green Vehicle Guide
U.S. Environmental Protection Agency
emissions ratings and how the EPA test cycles that produce mpg numbers are run
Clean vehicle tax credits
Internal Revenue Service
federal credit amounts, income caps, MSRP caps and the point-of-sale transfer rules
Laws and incentives database
U.S. Department of Energy, Alternative Fuels Data Center
state rebates, HOV access, registration fees and which programs are still funded
Alternative fueling station locator
U.S. Department of Energy, Alternative Fuels Data Center
public charger counts, connector types and network coverage by state
Gasoline and diesel fuel update
U.S. Energy Information Administration
gasoline prices by region and week, which is why we quote ranges and not one price
Electricity data and average retail rates
U.S. Energy Information Administration
residential electricity rates by state for charging cost math
Recalls, investigations and owner complaints
National Highway Traffic Safety Administration
open recalls and defect investigations by model and VIN
Clean cars and zero-emission vehicle programs
California Air Resources Board
CARB-state emissions warranty rules and clean air vehicle decal eligibility
Vehicle and battery technology research
U.S. Department of Energy
battery durability, charging behavior and cold weather range research
Ground vehicle standards
SAE International
charging connector and charge level definitions such as J1772 and CCS
National Electrical Code
National Fire Protection Association
circuit sizing, breaker and permit requirements behind home charger install costs
Car reliability and owner satisfaction surveys
Consumer Reports
owner-reported reliability and trouble spots by model and model year
Vehicle Dependability Study and Initial Quality Study
J.D. Power
problems per 100 vehicles by brand, used for ranking direction rather than exact scores
Vehicle values and cost-to-own data
Kelley Blue Book
resale and depreciation estimates used in the ownership cost tables
High occupancy vehicle facility guidance
Federal Highway Administration
HOV lane rules and the federal framework states use for clean vehicle exemptions
Drive Clean Rebate
New York State Energy Research and Development Authority
New York rebate amounts, eligible models and remaining program funding
What we will not do: we do not invent test results, we do not publish review scores or star ratings we did not earn the right to give, and we do not describe cars we have not driven as if we had. Nobody here runs a dyno or a range test. What this site does is read the primary sources carefully and translate them into shopper language.

Incentive pages go stale faster than anything else

Clean vehicle credits and state rebates are the least stable numbers we publish. Eligibility lists shift as battery sourcing rules tighten, state programs run out of money mid-year, and legislatures cut or cap programs between sessions. A page that was correct in March can be wrong in June without a single word changing.

So the incentive pages are handled differently:

  • Every incentive figure is written as a rule plus a gate, not as a promise. Up to $7,500 is the ceiling, not the expected outcome, and the page says which gates knock it down.
  • Incentive and cost pages are rechecked against the source at least quarterly, and again whenever a rule change is announced. The date at the top of each page is the last date it was checked, not the date it was first written.
  • Where a program is first-come or funding-limited, we say so and send you to the program operator to confirm it is still open. We are not a live incentive tracker and we do not pretend to be one.
  • We never tell you a specific car qualifies. We tell you which list to check, because the trim, the battery configuration and the assembly plant all move the answer.

There is no single national fuel price, so we do not quote one

Gasoline prices vary by more than a dollar a gallon between states and swing week to week. Electricity rates vary just as widely by state and by time of day. Any payback calculation that hangs on one national average is a calculation about a place nobody lives.

Our cost pages are therefore built as templates. Where we show a worked example, it is labeled as illustrative and the inputs are visible: the fuel price used, the annual miles, the mpg figures, the years of ownership. Change the inputs and the answer changes, which is the point. Where a figure is genuinely uncertain, we give the range and name the source you should check for your own region rather than picking a midpoint and calling it fact.

The same rule governs install quotes, insurance surcharges and resale values. Those are quoted as bands with the drivers of the spread explained, because a single number would be a guess wearing a decimal point.

Efficiency figures are EPA figures, and we say what they miss

Every mpg, MPGe and electric range number on this site comes from the federal fuel economy program run by the Department of Energy and the EPA, because that is the only set of ratings produced on a standard test cycle across every model. Manufacturer marketing numbers do not go on our pages.

That standard cycle is also its weakness, and we flag it rather than hide it. Rated figures are measured in mild conditions on a set drive pattern. Cold weather, sustained highway speed, roof boxes, hills and a heavy right foot all pull real-world results below the sticker, particularly for plug-in hybrids where the electric range is the part that suffers first. When we say a number will be optimistic for you, that is an interpretation of the test method, and we mark it as such.

Who writes this, and who pays for it

Everything here is published under the byline Ellis Vantorre, which is a writing name rather than a claim about a credentialed expert. The byline page explains exactly what that means and what the role covers. We are not a dealer, a manufacturer, a certified mechanic, a tax advisor or a licensed electrician, and we say so on the pages where it matters.

On funding, plainly: at the time of writing this site carries no advertising, no affiliate links, no sponsored posts and no paid placements. Nobody pays to appear in a buying guide and nobody can pay to be removed from one. The domain and hosting are paid for by the site's owner. If that ever changes, and affiliate links or ads are the most likely change, it will be disclosed on this page and labeled on the pages that carry them before a single link goes live. We would rather lose the revenue than run it quietly.

Corrections

We will get things wrong. Rules change, sources update, and a figure typed at speed can land a digit out. The useful question is what happens next.

  • Send corrections to [email protected]. Include the page URL and, if you have it, the source that contradicts us. That single link is worth more than a paragraph of explanation.
  • Anything we can verify against a primary source is fixed or pulled. If a claim cannot be sourced, it comes off the page rather than getting softened into something vaguer.
  • When a fix changes the substance of a page rather than fixing a typo, the last-updated date moves and the source block is updated to match.
  • Corrections go to the front of the queue ahead of everything else in the inbox. We will not invent a turnaround window we would then miss, and on a site this size a general question can sit unanswered, but a claim we cannot stand up comes off the page whether or not we manage to write back.

What we cannot help with: personal purchase decisions on a specific VIN, mechanical diagnosis, or whether your particular tax situation clears an income cap. Those need someone looking at your paperwork, and that is not us.

Next reads on What Is The Hybri

This page describes how we work, not a legal guarantee. Confirm current rules on the source site before you spend money, and talk to a tax professional or a licensed electrician about anything that turns on your own paperwork or wiring.