Miles per tank fading......NEED UR INPUT.

mikedeezy123

mikedeezy123

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So I am just curious... what are you guys getting mileage wise per tank? I just feel lately like the LS is drinking gas like there is no tommorrow. Please state your year, mileage, V8 or V6 and dirving habits.

2000
V8
240-275 Miles per tank
Usually all city driving with AC on most of the time. I rarely push this car hard at all and drive it pretty calmly meaning NO HIGH REVS.


Any ideas on what I can do to bump up the MPGs?


Thanks guys!
 
2000 V8 230 mixed never beat on it, I just put 19's on but even with my 17's it was crappy. I usually run the AC, keep up with every filter change ( oil, air, and fuel ) but I know I should be doing something more cause even with 230 a full tank it don't last long at all. I check my air pressure every other week or so but it is almost always on point.


I think we are just getting in shlty gas lately, all of a sudden for instance I get gas at a different gas station, same brand, same octane but its been pinging no matter what I do! I ran that out and got gas at the typical stop and I get the same damn thing.

I'm going on a good trip today, I'm gassing up with a full tank and Im sea foaming the fuel, I'm gunna see how I do with a full tank and small amount of luggage with my 17's back on.
 
i get 320 now that i switched do D5. i use to get 290 w/ 16.4 per gallon i believe. now i get the 320 w/ 17.4. also when i changed the fuel filter it went up just a tad. make sure the tires are at their correct psi. of course oil, and other things are to consider but those are the main ones. and also use one of those octane boost cleaners, might work
 
Yo mikey.....

Just wait till next summer with 120ish weather out there. When I go out to the vegas house, my LS sucks A$$...power wise
 
2000 LSv8 w/108kmiles, i average 19-20 mpg/300+ a tank.... bout 40% hwy 60% city...with 16" wheels and a/c on most of the time.

after the CAI and exhuast, i hope for it only to go up as it should with a better breathing engine.

Dont you guys think the mileage should increase with larger rims? if in 1 rotation you end up further...it should take less gas to get where your going lol. granted 20's are adding extra weight...but 17's or 18's i dont think it should be a huge problem. i cant imagine getting 230 a tank like some of you. If rims hurt ur gas mileage then im not gonna get any lol. the stock 17" 5 spokes maybe, but screw anything bigger.
 
230-240/ tank is about right for our 2nd Gen LS'
 
King03LS8 said:
230-240/ tank is about right for our 2nd Gen LS'
Click to expand...

i would think if you do mostly in city driving.

i never go into high rpms on my LS. and with high rpm i mean 3k plus. i am averaging 18.8 on the fuel display. it seems about accurate considering the only driving there is to do around here is city.
 
300-340 depending on how I'm feeling, sometimes I like to blast around all day, I average 19-22 MPG if I drive normally(I drive 30 miles to work every day at about 50-60mph) If I'm drivin around by my house in the burbs I get around 16-18 MPG, normal driving. I used to average 16-17 MPG until I changed the fuel filter, no matter what kind of driving I was doing.
 
01 V6, I pretty much am always on the gas. 100 percent city driving. I can go a good 220 miles before I'm on empty.

Terrible gas mileage, I fill up every couple days.
 
sorry, i forgot to include:
2000 V8, 101,000 miles, usually reserved driving style, AC rarely on.
 
2002 V8 38K miles 60% highway driving

I usually get 340-350 out of a tank of 89 octane

Last week I tried using 91 octane and it droped to 310 :confused:
 
trilkb said:
Dont you guys think the mileage should increase with larger rims? if in 1 rotation you end up further...it should take less gas to get where your going lol. granted 20's are adding extra weight...but 17's or 18's i dont think it should be a huge problem. i cant imagine getting 230 a tank like some of you. If rims hurt ur gas mileage then im not gonna get any lol. the stock 17" 5 spokes maybe, but screw anything bigger.
Click to expand...

Ummmm no. Larger rims should not equal larger overall diameter of tire. Otherwise your speedometer would be off and likewise your displayed miles driven. Larger wheels weigh more and therefore require more energy to start/stop rotating. For instance if you take a vehicle straignt off the lot that comes with 17" wheels (say an explorer) and put 22"s on it you will immediately notice a decrease in 0-60 time as well as longer stopping distances. The test has been done.

SPY said:
2002 V8 38K miles 60% highway driving

I usually get 340-350 out of a tank of 89 octane

Last week I tried using 91 octane and it droped to 310 :confused:
Click to expand...


Strange... I would not fill my LS with anything but 91+ as required by the owner's manual. Perhaps it was simply the PCM getting used to the new gas, since you typically fill with 89 the computer has likely retarded the timing.


I get around 19 combined mpg ~320mi per fill-up. I frequently run it to the redline. It has been as high as 26 mpg all highway (I ran it 450mi on that tank). BTW '04 v6
 
^ right i said granted 20's are adding extra weight. i was just talking about rims slightly bigger...17-18 rather then my 16's.
 
larger rims have more rotational inertia which means more energy will be required to get them spinning and to stop them.
 
Since I put 20"s on mine the average in the display has dropped to about 19.2-19.4 mpg. Before with the stock 17" sport rims I was only getting about 20.4-20.6 mpg so that's not too bad a difference. I can live with losing 1 mile per gallon. I'm still getting over 300 miles per tank. :)

It's an '02 V8 with 101K...
 
trilkb said:
^ right i said granted 20's are adding extra weight. i was just talking about rims slightly bigger...17-18 rather then my 16's.
Click to expand...

Going from a 16" wheel to a 17" or 18" wheel should not affect the overall diameter of the tire. Your tires will have a shorter sidewall in order to keep the same overall diameter (assuming they were properly matched). The tire circumference (total distance that touches the ground in one revolution) will remain the same. C=2*(PI)*R (where R=total wheel + tire diameter)

If for some reason you do put a tire with a larger circumference on the car your calculated mpg should not be affected (not noticeably anyway). The car may actually be traveling a farther distance on one revolution of the tire but the car will 'read' the distance from the stock wheels and therefore your speedometer will be off (too slow) and thus your calculated mpg will be lower than what you actually get. Make sense? This also makes the assumption that it will not require more gas to make the wheels turn one full revolution (which is likely a false assumption).
 
Has anyone tried a Tornado fuel saver? I tried it but I did not see a difference, so I removed it today.
 
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