I have looked and looked, but I can not find any emissions results.

i'm sure its different for each car since it doesn't really depend on mpg

A Prius a day keeps the doctor away!

Hi Guys:

PM

TLEV: 0.400
LEV: 0.010
ULEV: 0.010
SULEV: 0.010

Euro IV: 0.040

___The higher your FE, the lesser PM emissions in whatever you drive.

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net

I dont know about particulate matter but john1701a seems to think that MPG has nothign to do with emissions other than CO2
Here's what john has to say:

Better MPG means cleaner emissions.

This is a troubling misconception, a belief leading to misinformed purchases.

Only CO2 (Carbon Dioxide) emissions have a direct relation to efficiency. Higher efficiency doesn't always mean less contribution toward "Global Warming" (the weather effect that causes storms to be more frequent and more violent, as well as temperatures to fluctuate with greater extreme). The harmful emissions leading to health problems are not correlated to MPG.

SMOG, which consists of NOx (Nitrogen Oxides) and HC (Hydrocarbons) plus a little bit of CO (Carbon Monoxide), is the type of vehicle emission that is harder to quantify, since MPG makes no difference. This pollution contributes to that nasty orange haze floating above most all of the major metro areas throughout the United States, which leads to breathing complications for young children and the elderly.

The "SULEV" emission rating was created to identify vehicles that were specially designed to reduce SMOG related emissions. The classic Prius achieves that criteria. The 2004 Prius actually exceeds it (having earned the "AT-PZEV" rating). Some traditional vehicles actually are SULEV too, believe it or not; but unfortunately they are only available in California and their MPG is very disappointing (even lower than their polluting counterpart). Lastly, not to put down the other hybrids, but... not every type offers SULEV cleanness; some are only ULEV, which is 72% dirtier with respect to SMOG related emissions. So don't just assume the highest efficiency equates to the lowest emissions.

A Prius a day keeps the doctor away!

Hi Flare:

___You just found out why you cannot trust everything posted by someone because they may or may not be entirely correct in many cases.

___Emissions testing and results are based off the same EPA FTP75 cycle that your automobiles FE is based off of as shown on the Mulroney sticker. A quick down and dirty example … (2) PZEV-AT rated automobiles of the exact model and year, Emissions control HW, and using the exact same fuel. One receives 46 mpg when not setup and driven like most do. The other receives 58 mpg when setup and driven by a hypermiler. Not only has CO2 been cut by 26%, all other emissions including CO, HC, and PM have dropped by a percentage although I will not say all have dropped by the same 26%. The after treatments (your CAT(s)) have a given efficiency to remove or convert the byproducts of combustion into something else less harmful and a higher percentage of byproduct going in (more fuel consumption) might be dropped to a very similar percentage effluent as the lower percentage byproduct going in (less fuel consumption) but they will never be the same because the after treatment is never 100% efficient. It is this FTP75 cycle and the bag emissions that shows what a given automobile can achieve and when you blow the FTP75 cycle away as any hypermiler will, the hypermilers emissions results will also be lowered across the board because there is less byproduct to be converted over a given distance (higher FE).

___The following article might help deduce some of what the EPA does on the very few automobiles that it actually does test …

EPA Testing Methods

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net

You're comparing 2 cars that are exactly the same though, what if you compared two different cars?

A Prius a day keeps the doctor away!

Hi Flare:

___You will probably never know exactly between one car and another because we don’t have access to the real testing results. Only those from the manufacturer stating a given automobile is a PZEV, SULEV I/II, ULEV I/II, Lev I/II, TLEV qualified. From 2004 - 2007 forward, it will be the - II’s or Tier II/Bin X as the new ratings with lower overall emissions, lengthier period needed for compliance, and all vehicles below an 8,500 GVWR will have comply to the same emissions over a given time frame of 50 and 120,000 miles. This is in contrast to the older Federal Tier I and CARB system(s) allowing differing emissions for different weight categories of automobiles at a minimum and maximum 50,000/100,000 miles depending on its GVWR. If the automobile meets a given emissions rating on a particular fuel when new and for a period of time following (PZEV’s must meet the SULEV-II emissions specs out to 15 years/150,000 miles for example), it is classified for that rating including the higher emissions as it ages in given increments per the EPA FTP75 emission testing procedures.

___The following might help …

Summary of the California and Federal Light- and Medium-Duty Vehicle Programs

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net