50mpg????? too good to be true???

IceMole19 · Post by **IceMole19** » September 1st, 2002, 7:43 pm

Ok this may puzzle you as much as me. I got this car maybe 2 weeks ago because it got better gas milage then my Rx-7. Anyway I filled it up then took a trip. Took me 8 gallons to fill it, I've never used over 10 from even when the fuel light is on. Book says it holds 12 so I figure 10 before and 2 after fuel light.Now I drove 152 miles and my needle is right below (I mean right below so much it's still on it) 3/4 of a tank. I figure at most i used 3 gallons? Which would make 50mpg?? The owner before said he got 33mpg doing 80 on the highway w/ the A/C on. Right before this trip I switched to the Valvoline High Milage engine oil 5w-30, so maybe that has something to do with it? Any ideas?

ProtegeSTS · Post by **ProtegeSTS** » September 1st, 2002, 8:23 pm

<BLOCKQUOTE>quote:<HR>Originally posted by IceMole19: Ok this may puzzle you as much as me. I got this car maybe 2 weeks ago because it got better gas milage then my Rx-7. Anyway I filled it up then took a trip. Took me 8 gallons to fill it, I've never used over 10 from even when the fuel light is on. Book says it holds 12 so I figure 10 before and 2 after fuel light.Now I drove 152 miles and my needle is right below (I mean right below so much it's still on it) 3/4 of a tank. I figure at most i used 3 gallons? Which would make 50mpg?? The owner before said he got 33mpg doing 80 on the highway w/ the A/C on. Right before this trip I switched to the Valvoline High Milage engine oil 5w-30, so maybe that has something to do with it? Any ideas?<HR></BLOCKQUOTE> the stock fuel gauge isnt entirely accurate as far as the positioning of the letters. When you fill it up and start driving, notice that you'll probably go more than 50-75 miles and it will still read FULL. Its accurate as far as when its low, you need gas, but the top section isnt overly accurate.

pelado · Post by **pelado** » September 1st, 2002, 8:25 pm

You can't calculate mpg based on partial tank levels. Gas tanks can be shaped to fit around various body structures, therefore one cannot make a linear comparison between tank level and gallons. That and the fact that level is measured with a float which can hang up, makes the gas gauge just something to refer to for general status of tank level, not something to use for precise calculations.The only way to calculate mpg with some semblance of accuracy is to use the trip odometer and fill 'er up. Wait until it needs filling again and see how many gallons you have to add. Use the miles from the tripmeter and calculate mpg.If you believe that a certain oil can give you the much of an increase in gas mileage, then you're a sure customer for the Tornado, the Turbulator, Split Fire spark plugs, gas line magnets, and any other snake oil that's for sale out there.

IceMole19 · Post by **IceMole19** » September 1st, 2002, 8:33 pm

Well I knew all that. Yeah and I didn't mean the oil gave me that, but the car got 33mpg the whole way to ocean city doing over 80 with the A/C on.Trip meter reads 152, I'm going to go fill it up again, see what it really got.**EDIT**Oh and my float is not hung up, the needle moves when I go up/down hills and such.[ September 01, 2002: Message edited by: IceMole19 ]

zytariuk · Post by **zytariuk** » September 2nd, 2002, 12:49 am

50mpg give me a f---ing break. That's all i got to say...

IceMole19 · Post by **IceMole19** » September 2nd, 2002, 1:30 am

Just filled it, and i mean filled it, to where the gas is sitting right at the cap, which may be too much but I wanted it full.Drove 162 miles total Fill took 4.1 galGas Milage = 39.5mpg Pretty sweet, I'll take that, better then the 11 my rx-7 gets. What does everyone else arround here get? This is the v6 too btw.

voltaire · Post by **voltaire** » September 2nd, 2002, 3:16 am

50mpg - No friggin way 39mpg doing 80 with A/C in a GS? - No friggin wayYou're either doing something wrong or your odometer/speedometer is off. Do you have non-stock sized tires with a different diameter? Did you fill it up all the way the second time like you did the first time? Was your whole trip downhill? Are you dsylexic? Bad with numbers? Prone to hallucinations?I'm grasping here because if that is your actual mileage in a GS, then me and my GS are very jealous.

voltaire · Post by **voltaire** » September 2nd, 2002, 3:31 am

<BLOCKQUOTE>quote:<HR>Originally posted by pelado: If you believe that a certain oil can give you the much of an increase in gas mileage, then you're a sure customer for the Tornado, the Turbulator, Split Fire spark plugs, gas line magnets, and any other snake oil that's for sale out there.

<HR></BLOCKQUOTE>Thicker or heavier weight oil will definitely give you less gas mileage than thinner or lighter weight oil. That being said, I don't think the special oil is behind the high mpg mentioned earlier.

voltaire · Post by **voltaire** » September 2nd, 2002, 3:43 am

Did you forget that you stopped and filled up the tank along the way?Did you have a huge aftermarket spoiler and a good strong tailwind?Were you drafting an 18-wheeler the whole way?Did you have your tires filled with helium?All of the above?Please! Tell me how to get 39mpg!!!

ProtegeSTS · Post by **ProtegeSTS** » September 2nd, 2002, 5:14 am

<BLOCKQUOTE>quote:<HR>Originally posted by voltaire: Did you forget that you stopped and filled up the tank along the way?Did you have a huge aftermarket spoiler and a good strong tailwind?Were you drafting an 18-wheeler the whole way?Did you have your tires filled with helium?All of the above?Please! Tell me how to get 39mpg!!!<HR></BLOCKQUOTE> Shift to 5th ASAP, and you'll be close. Engines are most fuel efficient under low rpm and heavy load.

pelado · Post by **pelado** » September 2nd, 2002, 11:31 am

<BLOCKQUOTE>quote:<HR>Originally posted by IceMole19: Just filled it, and i mean filled it, to where the gas is sitting right at the cap, which may be too much but I wanted it full.Drove 162 miles total Fill took 4.1 galGas Milage = 39.5mpg Pretty sweet, I'll take that, better then the 11 my rx-7 gets. What does everyone else arround here get? This is the v6 too btw.<HR></BLOCKQUOTE>You had to fill it that way at the beginning AND fill it that way at the end of your trip. Filling it consistently will get you accurate numbers, inconsistency makes you believe you've got a one of kind GS.It's also more accurate to wait until the tank is near empty to fill it.I find the 39 mpg number hard to believe. The only time I got mileage numbers like that was back when I drove a '89 Suzuki Swift GTi. I get 20-25 mpg in town and about 30 mpg on the highway the GS. My driving style is not conducive to producing high mpg numbers though.

IceMole19 · Post by **IceMole19** » September 2nd, 2002, 1:05 pm

Guys come on, I'm not stupid here. Let me explain......I filled the gas tank took 8 gallons from 1/4 mark.Drove to my girlfriend’s college for the weekend, drove around down there, drove back. This was 162 miles.Filled the tank last night with 4.1 gallons.I think that basically says everything, I'm not lying, I didn't do anything special. Also, the guy before said he got 33mpg at 80 w/ the AC, not 39. I got 39, it was a nice 70 degree day out, windows up, sunroof open kind of deal. My tires are stock size, the rims are stock size, drove about 75 on the highway. Believe me I was as stunned as you are.**EDIT**Oh and no I don't drive like a crazy guy, i don't redline every shift. Ever read your owners book and read where it tells you to shift? Ever look at your window sicker where it says this car will get up to 53mpg? I'm not saying it will but don't call me a liar, I'm not stupid, my IQ is 168 and I got to Penn State for Computer Science, got a 1480 on my SATs so I'd like to think I can calculate gas mileage.[ September 02, 2002: Message edited by: IceMole19 ]

ProtegeSTS · Post by **ProtegeSTS** » September 2nd, 2002, 2:00 pm

<BLOCKQUOTE>quote:<HR>Originally posted by IceMole19: I'm not stupid, my IQ is 168 and I got to Penn State for Computer Science, got a 1480 on my SATs <HR></BLOCKQUOTE>168 and you only got a 1480... pfffttt

lazzyie · Post by **lazzyie** » September 2nd, 2002, 2:23 pm

i get 26 town, 32 freeway, dah well...

David Coleman · Post by **David Coleman** » September 2nd, 2002, 7:21 pm

The car will get up to 53mpg if you're coasting down the rockies in Neutral.Directions for calculating MPG: 1) fill the tank all the way up 2) run it for x amount of miles [the more the better, for average purposes of course] 3) fill it up to the exact amount you originally filled it up to. None of this half tank business, as that's guesswork. As has already been mentioned, the stock gauge is only good for telling you when you don't have any gas. Since you have such a high IQ and go to PSU, I'm sure you understand instrument calibration. The gas gauge has no precision. Period.With a GS, you're going to get at BEST, mid 30's [that was with a well maintained GS on 4.11:1 gears and stock tires @ 45psi] on the highway. Unless PSU's math department now employs enron accountants as fundamentals prof's.... [img]shrug.gif"%20border="0[/img]

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50mpg????? too good to be true???

50mpg????? too good to be true???

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