tips about an already economical car

[dubber]

Hello
I am from the Netherlands and I drive a 2003 Renault Twingo 1.2 16v 75hp.
In general I get 20.1 km per liter of petrol.
There are some tricks about improving the range but I am interested on the first simpel things to do.
Things what I thought about and I would like your opinions about if it is useful or not are:
- removing the antenna.
- Something can be done with the wheels, I like to keep the standerd 14 inch steel wheels but I think the wheelcaps can be better.
The rear wheel archers can be more closed so that the rear wheel are covered, but with what and how much?
- The panel gaps are relative large, how can I fill this gaps without tape?
The grill and bumper can be more aerodynamic but there has to be cool air to the radiator.
What to do there?
-Other things like less weight is considered.
I would like to have a 6 speed manual but that is to expensive for the benefits.
Are there other relative easy things to do to improve fuel economy?

Thanx in advance

[LeanBurn]

20km/1L = 5L/100km =47.04 mpgUS = 56.5mpgUK

Pizza pan wheel caps, upper grill block to start aside from maximizing your driving style.

What does the underside look like? Are you using synthetic oils? Tire pressures optimized?

[dubber]

Underside is standard and not aerodynamic.
I can put panels there, but how to attach them safe?
Is there a DIY way of hubcaps? or can I buy these somewhere online? (Europe?)
It needs an service so I have a option to use the best oil available (but wich one?)
Tire pressure is about 2.4 to 2.6 bar.
I am driving relative economical, it means not above 110 kp/h, steady driving, minimum breaking, looking ahaid.
But not like a very old person and not annoying all the other road users.

[aerohead]

I completely taped all the panel gaps on my truck for the wind tunnel and the difference in drag could not be measured,so I don't anticipate any savings for you there.
Simple pizza-pan wheel covers would help.
Wheel skirts would help.
The belly panels would help.
I tried expensive,full-synthetic transaxle lube (Red Line Racing Oil) in my Honda,and couldn't measure any savings.
On the open road,at highway speed,the greatest saving would come from boat-tailing,or a box-cavity device.The box-cavity would be the easier to fabricate.The boat-tail would have the highest performance.Perhaps a 15% mileage improvement by itself.

[TexasCotton]

Mr Aero Head
I now realize why driving to Gainesville Texas is a PIA aka Sanger 35 Interstate road construction is horrid on any random day.

[freebeard]

Mr Aero Head

Hey, aerohead. I din't know Texans were so formal.

[Piotrsko]

They can be right after they punch you in the face

[aerohead]

Originally Posted by TexasCotton

Mr Aero Head
I now realize why driving to Gainesville Texas is a PIA aka Sanger 35 Interstate road construction is horrid on any random day.

Wow,yeah!
I hit the LOVE's at Milam Road about a week ago,to grab some air conditioning and an icy drink after mowing at a friend's place.I-35 was a complete parking lot!!!!!!!!!!!!!!!!!

[dubber]

I will take some detail pictures later.

Also what is better, pan style flat hubcaps or lightweight alloy wheels like vw lupo 3L wheels.
They are 4.5 kilo each and bolt pattern is the same, just the center needs to bored out a little.
I dont know what a standard 14 inch steel wheel weights.

replacing the mirrors with small camera,s with a screen inside the car, would that help out a lot?

[freebeard]

Underside is standard and not aerodynamic.
I can put panels there, but how to attach them safe?
Is there a DIY way of hubcaps? or can I buy these somewhere online? (Europe?)
...
Also what is better, pan style flat hubcaps or lightweight alloy wheels like vw lupo 3L wheels.
They are 4.5 kilo each and bolt pattern is the same, just the center needs to bored out a little.
I dont know what a standard 14 inch steel wheel weights.

Two factors:
Weight — they carry angular momentum which can be more than the static weight. Makes a difference speeding up and slowing down, not so much at a steady pace.

Aero — a smooth cap will have lowest Cd but poor brake cooling. You're choice.

ecomodder.com: dzus-fastened-moon-disc-wheel-covers-32996.html

ecomodder.com: fasteners-20563.html

Dzus fastners can be used for the belly pan and the wheel disks.