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@thatciggaweed Denser air is better but a cold engine runs less efficient than an engine that has warmed up. The colder is it the longer the engine takes to warm up.
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coast only if u have a manual, as when u take your foot off the gas the engine is still turning at 2000-3000 rpm rather than idle speed
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coasting does use fuel, morons -_-
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in my jetta vr6 i normally get 8L/100km (29.4mpg) on the highway. when i draft behind a truck i get 5.8L/100 km (40.6 mpg). and tailgating a truck is not that dangerous as long as you pay attention. it takes a truck a lot longer to stop than a car
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*"step 7 keep AC off and roll up the windows."
- try doing that in South Texas during the summer in an Isuzu
hombre lol just saying.
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No AC if you drive below 55mph (from Mythbusters)
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The bitch cares soooo much about fuel efficiency yet she's driving a jeep?
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this makes no sense, in the last howcast vid I watched, it said to use AC, but this tells you to keep it off?? WTF howcast get your facts straight!! -.-
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@the1bigace thats what i said.the engine itself needs runs most efficiently when its up to operating temperature, but the air going into the engine should be as cold as possible to give a more efficient bang inside the cylinder. i think i may have exhausted this topic with another person. have a look through the other comments.
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@thatciggaweed yes, a cold INTAKE is great because of oxygen density however WARM ENGINE Combustion temperatures burn the fuel better. Thats what a COLD AIR INTAKE is for, it pulls air from outside the engine compartment and away from the hot engine. NASCAR drivers and Drag Racers idle their engines for as long as possible to keep it warm and in optimal range for the race. And Drag Racers do a burnout before their run to build heat in the engine. so remember COLD intake WARM engine.



ok...... step1- buy a 4cyl turbodiesel.
Step2- dont buy a american car
Step3-Dont buy a hybrid Becuz yea they may get 5-10 more mpg then your old car but years down the road when the battery needs to be replaced your looken at 4k and labor charges not to mention any engine problems.
step4-your v8 pos SUV is not impressive. :)
g4ebguy 2 years ago 31
is it just me or has anyone else been told engines run better when its colder outside, becauase the air is denser
thatciggaweed 2 years ago 11