Those cats are some truly neat pieces of engineering. Though I have to know where do you draw the line on burning all that extra fuel and producing very little emissions or cutting your fuel usage in half yet having more emssions.
Find More Posts by jeepinbanditrider. Originally Posted by jeepinbanditrider. Not even close to double in my experience. The ION gets mid 20s with mixed driving 30mpg cruising 80 on the interstate. The Miata gets about the same. I'm not saying that fuel mileage is hampered by the emissions equipment I was simply saying that with my older bike I got much better mileage but produced way more emissions, a lot of that having to do with most bikes not having cats until recent years I would assume.
Remove advertisements Sponsored links. Send a private message to Sioux-B'Rue. Lardo Title: Banned. Find More Posts by Lardo Code Title: Burning Monkey. Send a private message to Code. Find More Posts by Code. Send a private message to BigBlack-V. Send a private message to Spec B. Find More Posts by Spec B. Partial Zero Excitement Vehicle. JimDod Title: New Member. I am depressed A PZEV is classified as the cleanest-running gasoline-powered car on the market and was developed to meet the air quality standards of California, the most stringent in North America.
Subaru PZEVs allow drivers to reduce their impact on the environment while sacrificing nothing by delivering a win-win combination of advantages:. Smog is a serious challenge for people with respiratory problems and can cause damage to crops, vegetation and forests. This noxious mixture of gases is formed when sunlight acts upon certain pollutants, which can come from sources such as liquid fuels, solvents and, organic chemicals, or from burning fossil fuels — for example, while running a car engine.
In response, the Subaru PZEV sets new, clean standards for gasoline engines, virtually eliminating the creation of smog-forming pollutants. In fact, it has such stringent pollution controls and the fuel-burning process is so complete, the exhaust produced can actually be cleaner than the air outside — and cleaner than some hybrid or alternative fuel vehicles. You have certain expectations of your Subaru.
Superior handling from the rally-tested, 4-wheel independent suspension. With no special maintenance requirements or unique maintenance schedule, the Subaru PZEV is easy to keep operating at peak efficiency at all times. Plus, each model consistently receives stellar crash-test results from the Insurance Institute of Highway Safety. Fully And it reveals how much our customers love their cars! With no special equipment needed — such as a secondary power source — the Subaru PZEV is virtually identical in design to its stable mates within the Subaru line-up.
This means that cargo capacity and interior space are not affected at all. The Subaru PZEV runs on regular unleaded fuel — something that is readily available and easy to access at filling stations across North America. For many years now, all Subaru vehicles are built in manufacturing facilities that achieve zero landfill status. With Subaru PZEV vehicles, the remarkable reduction of smog-forming emissions is achieved through modifications in four key areas:.
A larger and finer mesh of catalyst-lined passageways within a Subaru PZEV catalytic converter greatly contributes to its ability to reduce emissions. Along the entire length of the mesh are precious metals catalysts whose role is to change the molecular structure of the offensive emissions that try to pass through. In fact, the contact area is almost twice that of a traditional catalytic converter, producing a much more effective conversion of pollutants. The fuel injectors on Subaru PZEV vehicles close tighter than conventional injectors to prevent evaporative emissions from fuel leakage into the intake manifold.
To prevent this, Subaru PZEVs are equipped with a charcoal canister in the air intake that absorbs these evaporative hydrocarbon emissions. To be environmentally friendly, PZEVs feature changes in several key areas.
According to Popular Mechanics , some of their unique features include:. As Sustainable America states, these relatively small adjustments to the engine and fuel system contributes to a major change. These PZEV features also capture potentially harmful gases like nitric oxide, carbon monoxide, and nitrogen dioxide, which all contribute to emissions in standard vehicles. Although these features can reduce smog and contribute to cleaner air, PZEVs have some drawbacks.
They don't decrease carbon dioxide emissions or improve fuel efficiency. That's why CARB considers them to be a temporary solution for automakers striving to develop viable zero-emissions vehicles. Once automakers master these vehicles, they'll move on to plug-in hybrids and all-electric vehicles. Eventually, automakers will focus on the ultimate goal or alternative fuel vehicles like hydrogen fuel cell vehicles. If you're considering a PZEV for the first time, you might have a few questions about these environmentally friendly vehicles.
Let's review a few of the most frequently asked questions about PZEVs. Want to find out if a PZEV is right for you?
Browse our comparison tests or read our first drive reviews to find the latest news on these sustainable vehicles. New Cars. Buyer's Guide.
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