93 Grand Prix Posted November 6, 2002 Report Posted November 6, 2002 Reading the same magazine, an artical said (and I quote) "Driving with your windows down, uses more gas that the air conditioner" How in the hell is that? The A/C uses the compressor! The compressor puts more load on the engine, and causes it to use more gas. Is this true? Please enlighten me :!: P.S. Still haven't got me engine runnin right yet! It's still-a-missin'. Quote
ctx46 Posted November 6, 2002 Report Posted November 6, 2002 what f*cken mag are you reading boy!!!! that is a bunch of bs...... who ever is wrighting those things should be drug out to the street and shot Quote
ismellrealbad Posted November 6, 2002 Report Posted November 6, 2002 You forgot an important piece of information from that magazine. Driving with your windows down at HIGHWAY speeds uses more gas than using your A/C. And if they didnt say that, thats what they meant. The amount of gas you give your car because of the drag created at 70MPH to get it going at the same speed as with window up A/C on is more - supposedly. I havent actaully done my homework on it but either its the placebo effect or i really have noticed a difference because my old 3.1 with the windows down i seemed to be pushing the gas down farther than if i had just kept them shut with the A/C on. If you just leave one window open that doesnt matter, but both windows open is the difference. Quote
Vegeta Posted November 6, 2002 Report Posted November 6, 2002 There was a test done but I haven't seen the results fora couple years. Its like 1 mpg or less difference between the two. Before you start slamming on magazines, you should probably understand the concept first. It is the drag caused from thewindows being down that puts more load on the engine than the AC pump. It must be at highway speeds though to create enough drag to have that difference. Quote
GnatGoSplat Posted November 6, 2002 Report Posted November 6, 2002 It's definitely very true. All that wind noise you hear with the windows down at highway speeds is drag. Not to mention the headliner won't last as long. Quote
DropTopOlds Posted November 6, 2002 Report Posted November 6, 2002 Perhaps I'm an exception. With the A/C running, I can average about 24mpg from my house to USM campus in Hattiesburg, MS (305 miles) With no AC and top down (windows down as well) I get 27 mpg... perhaps my calculations are off... I'm going back to Hattiesburg in a few days, so I'll check it again. Quote
ismellrealbad Posted November 6, 2002 Report Posted November 6, 2002 I think a convertible is much much much different, as there is nothing "catching" the the air as it goes into the cabin, it just flies right on thru Quote
GnatGoSplat Posted November 6, 2002 Report Posted November 6, 2002 Yep, I agree. No back window, and no roof to stop the airflow. Quote
Chinski Posted November 6, 2002 Report Posted November 6, 2002 One of my buddies older sisters used to have this early 80's POS volkswagen, she had to roll the windows up to go down the highway without mashing the gas the whole way, so it must create quite a bit of drag. Quote
NORBI Posted November 6, 2002 Report Posted November 6, 2002 While we are on convertibles i have a question for everybody that have CS Convertible. I used to have 94 CS Convertible (for 1.5 year) with a 3.4 DOHC and i just wanted to know how many miles could you do on a full tank of gas because i could barly do 200 and the most i did on highway was 240 and i think thats bad for a V6 because my v8 4.6 in my Stang GT i did 320 on highway (13 gal tank) and about 250 mixed. SO was my Convertible just bad on gas or my Ford is so good. Quote
chronic139 Posted November 7, 2002 Report Posted November 7, 2002 I get about 370 KM (235 miles) in my 92 GP 3.4. But I just changed the plugs tonight and they were bad so well see if it improves. Thats mixed mileage by the way Quote
GPRACER Posted November 7, 2002 Report Posted November 7, 2002 I can't get 300 km(188Mi) with my '95 3100 in the city, excellent on the highway though aprox 450-500 km.(312 mi) What Can I say I have a lead foot and I hate F-Bodies Quote
chronic139 Posted November 7, 2002 Report Posted November 7, 2002 I did all highway on a tank of gas once since I owned the car and I got 600 KM. thats 375 miles. i was happy that day Quote
cstyle73 Posted November 7, 2002 Report Posted November 7, 2002 When I moved from Cali to GA I averaged about 350 to 375 mph coming across country. (1993 Cutlass Convertible with 3.1) Quote
Chinski Posted November 7, 2002 Report Posted November 7, 2002 375 mph eh? Thats a real fast W! Quote
cstyle73 Posted November 7, 2002 Report Posted November 7, 2002 OOOPS. That sounded like a ricer braggin about a race. I meant Miles Per Gallon. Quote
91CuttyConv Posted November 8, 2002 Report Posted November 8, 2002 My 1991 Convertible with the 3.1 gets about 325 to the tank highway and about 225 city. My friend once had a Z34 with the 3.4 and he had terrible gas mileage, city he was lucky to get 170 and highway was hardly better at about 210. He had new plugs, filters, the whole nine yards, nothing solved it. Jason Quote
Justin Posted November 9, 2002 Report Posted November 9, 2002 I'd love to get 375 mpg! I can get 35 with the 5 speed, what's your secret? by the way, 375 miles per tank is pretty damn good as well. Quote
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