car economy info image
Ebony B
Driving at high speeds decreases mileage, but so does constant acceleration and braking.... so how does driving at higher speeds on the highway give you better mileage according to EPA mileage info?
Thanks, Project.
Ok.... so, I live in L.A., and our highways are usually filled with traffic, so the advantage of higher highway miles probably wouldn't apply to me, right?
Answer
It takes less fuel to keep your car going at a constant velocity than it does to get it moving from a stop. All the stop and go you do in city driving uses more fuel than a constant speed on the highway. Idling and accelerating are the two biggest drains on fuel economy, and you do them often in city traffic. By keeping the throttle relatively still and not flucuating much on the highway, you are delivering a constant even fuel supply to the engine, instead of large amounts of fuel in bursts during stop and go traffic. Now, just because you get better mileage on the highway does not mean the faster you go the better economy you get. There is a point of diminishing returns where the vehicle's aerodynamics will start to bring down fuel economy. But, driving at a constant speed is what gives you the fuel economy advantage over city driving. Hope this helps.
It takes less fuel to keep your car going at a constant velocity than it does to get it moving from a stop. All the stop and go you do in city driving uses more fuel than a constant speed on the highway. Idling and accelerating are the two biggest drains on fuel economy, and you do them often in city traffic. By keeping the throttle relatively still and not flucuating much on the highway, you are delivering a constant even fuel supply to the engine, instead of large amounts of fuel in bursts during stop and go traffic. Now, just because you get better mileage on the highway does not mean the faster you go the better economy you get. There is a point of diminishing returns where the vehicle's aerodynamics will start to bring down fuel economy. But, driving at a constant speed is what gives you the fuel economy advantage over city driving. Hope this helps.
What is the lifespan of a turbo on a car?
John
Hey everyone. I want to buy a audi a4 turbo, and my Dad
said that turbo's are hard on the engine so he wont let me buy one. is this true? How long would a typical engine with a turbo on it last? any other turbo info would be great. thanks.
Answer
He's right in several ways...
First turbo charged vehicles take a lot of extra care and maintainance, attention to particular details to specific things to keep them in tip top condition...
unfortunately few people or owners remember to keep up with all these things along with the life of the car even if they bought it new and had the owners manual with instructions etc. with the special instructions for the addtional special specific care needs for the turbo engine which are different than the same engine without the Turbo on it
Turbocharged engines are even more critical on warm up and oil cuirculation issues before driving away from the curb or driveway.... At least 2 minutes idle time is recommended before driving away also a spool down/idle down time of 2 minutes is recommended prior to turning the engine off when you park it...
These parimeters are most often forgotten and neglected by the owner/driver and are the causes of heavy engine and turbo charger wear and failure...
should a turbocharger fail... you must have the engine also inspected for damage prior to turbocharger replacement or you may have the engine fail too soon after turbo charger replacement...
An exact engine life is hard to estimate it depends on how freqeunt oil was changed (I recommend every 2000 miles to trurbo owners) how car was driven was idle spool up/spool time always followed etc.
dad's advice is good stay away from turbo cars for the most part unless you're a true car nut enthusiast prepared for the extra headache precautions...
also Audi's are status symbol cars so I recommend most people stay away from them, oter status symbol cars are Volvo, Mercedes, Saab, BMW (Beemers)
status symbol cars are almost always imports with a few exceptions and the parts and labor for them always cost more and they often get poorer fuel economy becasue they're targeted toward people who have more money (the affluent)
Walt
He's right in several ways...
First turbo charged vehicles take a lot of extra care and maintainance, attention to particular details to specific things to keep them in tip top condition...
unfortunately few people or owners remember to keep up with all these things along with the life of the car even if they bought it new and had the owners manual with instructions etc. with the special instructions for the addtional special specific care needs for the turbo engine which are different than the same engine without the Turbo on it
Turbocharged engines are even more critical on warm up and oil cuirculation issues before driving away from the curb or driveway.... At least 2 minutes idle time is recommended before driving away also a spool down/idle down time of 2 minutes is recommended prior to turning the engine off when you park it...
These parimeters are most often forgotten and neglected by the owner/driver and are the causes of heavy engine and turbo charger wear and failure...
should a turbocharger fail... you must have the engine also inspected for damage prior to turbocharger replacement or you may have the engine fail too soon after turbo charger replacement...
An exact engine life is hard to estimate it depends on how freqeunt oil was changed (I recommend every 2000 miles to trurbo owners) how car was driven was idle spool up/spool time always followed etc.
dad's advice is good stay away from turbo cars for the most part unless you're a true car nut enthusiast prepared for the extra headache precautions...
also Audi's are status symbol cars so I recommend most people stay away from them, oter status symbol cars are Volvo, Mercedes, Saab, BMW (Beemers)
status symbol cars are almost always imports with a few exceptions and the parts and labor for them always cost more and they often get poorer fuel economy becasue they're targeted toward people who have more money (the affluent)
Walt
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