ChudiM

I have an es350 with about 75k miles on the odo, when I take it on the highway, the AVG consumption gives about 12-14L/100km

But when in town currently I am AVG 18L/100km

No check engine lights on, Lambda seems to be fine from live data 0.998-1.001

Any ideas on how I can get this car to take less fuel within the city, I actually tried not using AC for a while but seems thesame AVG consumption

Is there. Way of teaching the computer to learn how to save fuel

Wilson2000

If your 2007 has the eco light (middle of tachometer), make sure you drive in a manner so that it is always lit. If the 2007 doesn't have the eco light, just drive like you have an egg between your foot and the accelerator peddle, and you don't want to crack it.

ChudiM

I have not seen the eco light on mine, so what rpm range should I not exceed to simulate this egg between the foot and pedal analogy?

Wilson2000

It's less about RPM, and more about how quickly you approach the necessary RPM for maintaining your speed. The more gradually you get to speed, the more fuel you will save. If you have a lead-foot and "floor it" all the time, you'll get your worst mileage possible. If you ease on the gas peddle most of the time, you'll get the best possible mileage.

ChudiM

Honestly, I try (in Mary j Blidge voice) but sometimes the driving around my way got you hot on pedals , I will try more this gradual approach and see how it goes, forgot to mention I have an 18" rim on hope it won't add to it

Wilson2000

No, wheel size is not a factor, but for many reasons you should keep the stock tire diameter when plus-sizing wheels.

Speaking of tires...make sure you keep your tires fully inflated to the specification called out on the driver's door jam as under-inflation will hurt your mileage.

ChudiM

Please could you give me a clearer explanation on what stock diameter is for example , I currently have on the car 225/45 R18 with 40psi

On my door plate stock spec is P215/55 R17 cold pressure @ 30psi

Wilson2000

You are close enough to the stock diameter, but you could get closer by going with a 235/45 R18. See the URL below for exploring this further.

danielnas

I'd change the spark plugs, air filter and put better engine oil in the car. Also it's a good idea to disconnect the battery for an hour to reset the computer. And drive more gently.

ChudiM

I eased off on the gas pedal as advised and I honestly saw the difference, the AVG went to 15.2L/100km at the moment.

ChudiM

This is my next line of action, I believe I have to do
Air filter
Plugs

As a matter of urgency as it is. Driving more gently is a must now

danielnas

i live in Canada and i get only 11 l/100km in -30 winters and 9l/100km in summer. I still go hard on the pedal once in awhile just for the joy of it. Remember to reset the computer by disconnecting the battery.

Racerd

Driving style
Tires / tire pressures
Winter fuels (winter fuels tend to not be as fuel efficient); Cold winter weather can also impact efficiency
Recent engine maintenance (plugs, coilpacks, air cleaner etc)
Excess weight (junk in the trunk)

All these play into your fuel efficiency

ChudiM

I really don't know the fuel spec, I stay in the tropics , making arrangements for the plugs already from Amazon, iridium denso sparks , I also checked my fuel trims and got these few screen shots, there was a comment here about total fuel tr while driving per cylinder to total about 5% per bank , kindly review mine please

Racerd

Curious for the OP.. your location says "Rivers"... what does that mean? Where are you? Climate? Topography?