Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-30-2021, 02:50 AM   #1 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
Filling up question

Not sure if this has been asked or discussed before so apologies if it has.

Obviously filling up to calculate tank to tank is easiest to track accurately but fuel has weight, eg a 45 liter tank filled is going to be a pretty significant weight increase. So in theory would only putting for example a quarter tank of fuel be more efficient? As this would be less weight to carry around?

My thinking is weight saving, i work from home and mainly do city driving so for stop and go less weight would be best correct?

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-30-2021, 05:49 AM   #2 (permalink)
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,720
Thanks: 8,151
Thanked 8,933 Times in 7,375 Posts
Like everything it depends. If the gas tank is behind the back bumper, it could alter the aerodynamic angle of attack.

As much as I've thought about it, it seems range anxiety would be higher.

I'd be more inclined to throw out the spare tire. They don't weigh less the farther you go and I haven't had a flat since I slid into a curb twenty years ago.
__________________
.
.
Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster

____________________
.
.
Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
  Reply With Quote
Old 07-30-2021, 09:22 AM   #3 (permalink)
EcoModding Lurcher
 
mort's Avatar
 
Join Date: Dec 2010
Location: Los Angeles
Posts: 333
Thanks: 151
Thanked 109 Times in 80 Posts
Hi Tbird1983,
If you drive the same number of miles and get the same average MPG, then you've hauled the same weight of fuel, whether you carried it all from the start of stopped for gas every mile.
Carrying more weight does use more gas, but it's probably linear - I mean if 100 lbs lowers your car's MPG by 1 then 200 lbs would lower it by 2. Roughly speaking.
-mort
  Reply With Quote
Old 07-30-2021, 10:46 AM   #4 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
Thanks for the replies, yea i guess its not going to make a huge difference in fuel consumption, but yea was just a thought LOL.

I am considering an ecu remap and dyno tune, its pricey but from what this company offers, i should see a 15-20% power gain and about 10-15% fuel efficiency gain.
  Reply With Quote
Old 07-30-2021, 11:24 AM   #5 (permalink)
Master EcoModder
 
Join Date: Apr 2021
Location: Germany
Posts: 386

Aerospyder - '00 Toyota MR2 Spyder
Team Toyota
90 day: 41.98 mpg (US)

Simme - '83 IFA Simson Suhl S51
Motorcycle
90 day: 76.59 mpg (US)
Thanks: 25
Thanked 183 Times in 140 Posts
The difference in fuel consumption would get eaten up by the increased amounts of trips to gas stations.
In my car I fill up all the way each time, ends up beeing maximum 41L or so aka about 30 kg of fuel or about 66 lbs for the metricly impaired.
That's at most 3% of my cars weight between full and empty.
If I filled up halfway instead of full, I'd end up making my car 1,5% lighter, wich is insignificant.
Ditching the spare tire and losing some weight would likely make more of a difference than 15 kg less fuel...
__________________
  Reply With Quote
Old 07-30-2021, 12:19 PM   #6 (permalink)
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,819

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - CBR600 - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 43.3 mpg (US)
Thanks: 4,327
Thanked 4,480 Times in 3,445 Posts
The difference in fuel economy is so small it wouldn't be measurable. Weight hardly matters, though it does matter more with stop and go driving.

A vehicle capable of regenerative braking will be impacted even less by adding weight.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
Old 07-30-2021, 09:12 PM   #7 (permalink)
It's all about Diesel
 
cRiPpLe_rOoStEr's Avatar
 
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,923
Thanks: 0
Thanked 1,697 Times in 1,515 Posts
I'd rather do the tests starting with a full tank, as the "ballast weight" on short trips would still eventually provide a safer baseline to calculate range on longer stretches of road (or lack of road) with a less-than-optimal access to fuel stations.
  Reply With Quote
Old 08-02-2021, 04:57 AM   #8 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
Awesome feedback, thanks everyone. Just dropped my car off at the mechanics, it has an issue with the cooling system, it keeps boiling the water in the reservoir bottle yet the heat gauge is only on half, ive had the car for just over a month and a full tank got me 550km only, mixed driving highway and suburbs about 50/50, its a 2012 chev aveo 1.6 LS, according to the specs it has a 45 l tank, so 12.2km/l, i have been doing mainly eco driving habits, timing traffic lights, coasting in neutral on downhills and to a stop at traffic lights if i cant time it right, driving slower etc and im still not even close to what the specs say i should be getting. Specs say approx 13.6km/l average.

Im hoping the water boiling issue is some of the cause of the higher than rated fuel consumption.
  Reply With Quote
Old 08-02-2021, 04:58 AM   #9 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
i have this model, from South Africa, so km and litres here LOL

chevrolet aveo 1.6 ls 5-door 2012-4 - Car Specs - Chevrolet Aveo Specifications - Information on Chevrolet cars and Aveo specs for vehicles
  Reply With Quote
Old 08-02-2021, 06:52 AM   #10 (permalink)
EcoModding Lurker
 
Join Date: Nov 2016
Location: South Africa
Posts: 18

Aveo - '12 Chev Aveo LS
Thanks: 0
Thanked 1 Time in 1 Post
Mechanic just came back to me, car has a blown head gasket, just my luck, bought the car just over a month ago and its already giving problems.

  Reply With Quote
Reply  Post New Thread






Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com