Factors/Modifications to Improve Fuel Economy

[suv]

yung tune up yun ba yung change spark plugs?

[alwayz_yummy]

tune up--change spark plug, adjust valve tappets(if any--some engines don thave adjustments like "2C"), check ignition wires, distributor, timing...

general: add mo yung wheels and underchassis mo....

[zero]

- correct tire pressure
- service your car regularly = having clean filters (air & fuel)
- drive with your windows closed. = reduces air resistance
- slow down - boring but true, driving 10% faster will use between 10 and 20% more fuel.
- clear out the junk inside your car's compartment.

[Bogeyman]

In addition to what's been mentioned, it also helps to plan your trips. Whenever possible, plot the shortest route to your destination beforehand, then leave early enough to take advantage of it.

And always have one or more alternate routes that you can tap whenever traffic threatens to slow you down. I personally don't mind taking a longer detour as long as it means continuous motion, rather than taking a more direct path and then getting stuck in traffic, wasting more fuel anyway.

[meledson]

+ Change driving style, do not be an aggressive driver.
+ Reduce your speed - drive at the slowest possible speed at the highest gear na di nanginginig ang makina.
+ Umiwas sa traffic - pasok na maagang maaga and either umuwi ng maaga din or late na late umuwi.
+ Loose weight - tanggalin lahat ng bagay sa sasakyan na di naman kailangan o pabigat
+ higher tire pressure - matagtag pero may savings ka rito, I personally uses 35 PSI on all tires.
+ engine in tip-top condition
+ Synthetic oils seems to help sa FC
+ aircon - use a temperature na comfortable ka. As minimum as possible, kung kaya, drive w/o an aircon and all windows closed. Kung kaya lang.
+ lessen electrical load - no high power amps, head lights only (dim), no fog lamps, use HID with projectors (Typical consuption:HID - 35 W, Halogen - 55W)
+ larger diameter wheel helps a little
+ narrow tires halps also - lesser friction
+ reduce drag - no roof caddy, no huge spoilers, no antenna farm, etc.
+ FC is worst during the first few km travelled ( mga 5 Km) - di pa kasi mainit (optimal temp) ang makina
+ idling FC = 0. Distance travelled is zero but you are burning fuel.

[uls]

Hack the ECU using a piggyback fuel controller

Alter the signals sent by the MAF/MAP to make the ECU think it is getting less air than it really is. The ECU will inject less fuel to match.

pero be careful, u might lean out the A/F mixture too much

stock fuel maps are set a little on the rich side so there's room for adjustment

[MXFX]

does anyone with cvt have any "tricks?" i got this idea from a nissan forum. in simple terms, drive the car and keep the rpm below 2k. with our sentra, i noticed when i hit 2k rpm, it drops while i am accelerating. i took it easy on accelaration this way and did mostly 40mph while my rpm stays at 1.25k to 1.5k rpm. i was able to go as fast as 50mph without going over 2k rpm. i did this today on a 25 mile roundtrip and averaged 25.4mpg (ac on 1 bar above low, 2 passengers, some cargo). revised epa city on the sentra cvt is 25.

[DonT]

Many suggest to keep the rpm down...e.g. driving 70kph on 5th gear instead of 4th gear.

Are there any drawbacks to this? I guess the engine is getting more stressed mechanically speaking.

[meledson]

Kung hindi nag vivibrate ang makina, OK lang na gumamit ng 5th gear. Disadvantage lang nito ay mahina sa acceleration. Pero pag titipid naman ang habol so ok lang.

Para matipid, use the slowest possible speed sa gear na gamit mo na hindi nag vivibrate ang makina. Usually nasa 1500 ang RPM.

[non-vtec]

was able to get additional 1-2kms per liter city driving by replacing my old noisy a/c compressor. along with other subtle mods like thinner oil, washable drop in filter, etc and most specially efficient driving habits.