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Originally Posted by sad-lumina-owner
You are laughing! Your car isn't screwed up with an onboard computer and injectors.
I'd go straight for it. You'll be surprised to get a 1/3 more mileage, especially out of the gasguzzling v8.
Its the new cars where the diminishing returns come in.
(1) on the one hand, they burn gasoline more efficiently and in a more controlled fashion to a degree, with computer and fuel injectors (but be warned that your onboard computer deliberately burns rich to produce gasses for the Catalytic Converter to work! - Yeah that's right: the car company has rigged your car to pollute and suck up gas so that you have to use the CatConv.!!!).
An alternate method of polluting less (A LOT LESS!) was more mpg and better cleaner burning (but that was abandoned in the 80s when Cat Converters were forced on everyone!).
(2) The car companies have actually rigged the cars so that your computer will detect you are running lean and will pump more fuel back into the mix that you don't need, wasting fuel, polluting, and preventing you from improving your mileage on your "new more efficient computer-car".
These are the crookedest bastards on earth. Supposedly there's an oil shortage, and they are forcing us all to burn twice the gas that we actually need.
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Factless rant, modern engines are running so lean they are on the edge of of the stoichiometric curve, this also enhances cat efficiency, I don't know where you come up with these issues, but it is getting droll. My 02 Lesabre loaded with luggage made a 5k trip last winter, and got exactly 30mpg! MY 98 LTZ 3800 ex police car made the same trip, got 29, and it had 170k on it! A family member had a 94 3.1 Lumina that ran fine, was beat up, 190k, still got 30 or better on the hwy!