SoCal Cyco

iTrader: (20)

So i filled my gas tank full, wrote down the milage 73,210. drove it till the light came on at 73,421 a total of 221 miles. correct me if i an wrong but our cars have 20 gallon tanks with the last 3 being reserve (when the light comes on). that comes out to exactly 13 mpg. i even add the lucas fuel injection cleaner in about a month ago to get better gas milage. wtf, am i wrong on our tank size? i hope so cause if not what else could be the problem. thanks in advance guys.
-cyco

esolo98

iTrader: (5)

I dont think it is a 20 gallon tank, I have never put close to that much gas even at almost dead empty.

Infamous 1

iTrader: (20)

I think its a 18 gallon tank.

benbuilt4u

iTrader: (5)

thats about right for my 430 around town on HWY i get 425 miles to a tank

edpineda

It's an 18 gallon tank, but the low gas warning light comes on very early, probably when there's at least 3 gallons left on the actual tank. You should do the MPG measure based on how much gas you actually put in, not the capacity of the car. I get 20mpg when I do city driving and 24 in highway. I've gotten as much as 27mpg on my 2001 GS300 on the highway (21.7mpg over the last 3000 miles). Cleaning the throttle body helped, think theres a DIY on that somewhere in this site.

Anybody get better mpg?

5t341th

iTrader: (16)

u pump your tank full and record how many gallons it took to refuel.
u use that to calculate your mpg

i get about 19mpg average from all my driving.
that sucks cuz my 240 got better gas mileage than the gs.
cant blame it tho. i havent done any maintenance

eskay269

iTrader: (6)

GS fuel tank is 19.8 gal. don't feel too bad, my last fill up I averaged 13 mpg too but thats with mostly city driving.

SoCal Cyco

iTrader: (20)

ok guys i just filled her up and it took 15.7 gallons. and i double checked our tank size and it is 19.8 gallons. 13 fricken miles per gallon, that sucks. granted all i do is city driving but really 13 mpg's. i will try and clean the t.b. but there has got to be another explanation.

toeb

also depends on what size wheel and tire you are running. 20's for example will make a difference in the mpg because of unsprung weight.

ex. my stock 16's with 215 65 16= 320miles to tank
my 20's staggard 225 35 (f) 255 35 (b) 290ish miles to tank.

heaiver wheel and tire!

toeb

i forgot to mention that.... thats with me driving the hell out of it!!!!!!

5t341th

iTrader: (16)

bad alignment specs would **** ur mpg too.
also change air filter, plugs, o2's, cats
also compression and leakdown test your motor
try to single out the problems

sakataj

iTrader: (182)

its ALMOST a 20 gallon tank. i intentionally ran out of gas last night (been driving with light on for 3 days) i filled up about half of a gallon from a can
and then bout 19.4 gallons from the gas station

nope....

.......even doing 65 (bout 2,000 rpms) in my gs430 (fresh alignment,all 4 tires set with nitrogen) coming back from atlanta a few weeks ago best i could manage was 415 and that was with the light having been on for close to 80 miles

nope, i average bout 17-19 in city and bout 21-23 on highway

bingo we have a winner gs tank is that size lol


ALSO OP
my light comes on and i still have bout 60-85 miles left as a reserve. your mileage will vary on alot of things.

your type of driving
city or highway
tires inflated properly
alignment
rim/tire size

WE HAVE TALKED BOUT THIS IN NUMEROUS THREADS BEFORE, please search sir. have addressed everything in some older threads

broken_tsi

iTrader: (1)

I have gotten over 430 miles in a tank doing ~75-85 on the highway. I would put a higher number, but I'm not positive how many miles it was, just that I was impressed.

SoCal Cyco

iTrader: (20)

thanks guys, i didnt even think about the rim size(i am on staggered 20's with a 35 series tire). i dont drive "hard", i will check tire pressure and sorry about not searching, i was kinda like a rant post along with a question. and if the light came on with at least 3 gallons left then i guess i got beter than 13 mpg's.

GSJake

iTrader: (21)

Now that's dedication to a question..
Thanks Brian.