As some may be aware I bought my 2014 ES250 recently. Has 110000km's
What can I expect in terms of average fuel consumption. It registers 10.7l/100km and it's done mostly city driving - short trips to date.
My Honda Accord is around 8L/100km and it's a 2L
These cars set the fuel/air mixture automatically so is there anything that needs to be "set" ?
It has had it's 105000km and 120000km service.
10L/100km seems high

 

This is mostly the US forum and we only get ES350 and ES300h here. Not sure you will find someone to answer.

 

The other challenge on this forum is the conversion factors. Most of us contributing to this forum are in the US and use "miles per gallon" rather than "liters per 100 Kilometers." That said, I have tried to do a conversion. If this information is accurate, then it sounds like your fuel consumption is pretty low. I presume you have the same 2.5 liter engine that I have in my 300h - but perhaps with a different tuning. I would expect your car to yield consumption somewhat better than the ES 350 we have here in the states. I would guess your vehicle's consumption to be closer to 26 or 27 mpg given the engine size.



Therefore, I would expect something closer to 9 liters per 100 Kilometers according to the conversion below. Again, take this with a huge grain of salt as we don't have this model here in the US so I am merely speculating as to the expected mileage. Hopefully another member with this model can respond and give you a reality check.

 

Also... to further complicate things, don't forget the conversion from US gallons to Imperial gallons. (then there's the whole "miles per furlong" thing) Probably of not too much help to you but my 2014 ES350 runs between 6.9 and 7.2 l/100 km when driven carefully on the highway (which equates to about 40 miles/imperial gallon) and 9.8-10.4 l/100 km in very short trips in and around town (27-29 miles/imp gallon) during summer... and that drops to 12 l/100 km (24 miles/imp gallon) in short winter trips (less than 10 km) winter with temps 0C down to -30C.

In and around town/city driving the ES gas version is a bit fuel thirsty with all of the braking and acceleration but that improves significantly at steady speed, highway driving. Remember, it's not a light car. If I were only selecting one for city/commuting use there is no question that I'd look for a hybrid. In town drive like there's a fresh egg between your foot and the accelerator pedal for a couple of tanks of fuel and see what the results are.

Edit: just as an FYI, I divide the l/100 km into 280 to get an approximate miles/imperial gallon number "doing the math in my head".

 

The OPs fuel consumption figures do sound a bit high. We also used liters per 100 km and I’m at 9.8 to 10 liters on my ES 350. I’d say the 250 should consume at least 1 liter less per 100 km. The biggest impact would be the ratio of city driving vs highway. I probably do 75% highway driving. Hope this comparison helps.
I’m in the UAE were average outside temperatures are most 35+ degrees centigrade so the A/C is working hard. The A/C would typically add around 1 liter per 100 km in fuel consumption as well.

 

And there shouldn't be any adjustment for the fuel-air mixture. In fact, you would need to have tuning software and an OBD2 interface to even mess around with that. It's coded into the ECU from the factory.

I've had some tuners tweak the A/F ratio on some of my previous modified Acura's because the ECU can only adjust so much when you change the dynamics of the exhaust, intake, camshaft profile, etc. But on a stock vehicle, you'll never have to mess with it (or even be able to without the right equipment and software).

 

I have had an ES350 bought new in 2015. Average mileage (according to the car) is 8.6 l/100km. Probably 75% highway, 25% city. Live in Canada so mileage is negatively impacted by cold winter temps.

 

But you're also comparing a 3.5L v6 vs an accord 2.0L i4. You're not anywhere close to comparison.

 

In South Africa where OP is, the Lexus ES 250 uses a 2.5 l, 4 cylinder engine for the non-hybrid version. They don’t have the 3.5 l V6.

Lexus.co.za

 

As with any use car that you do not know the service history of:
Fresh oil, synthetic oil? Tire pressures, tire fitment (stock size or oversize?0
Filters especially the air filter clean? Aftermarket rails or rack on roof or boot?
Suspension alignment check out? Brakes incl. parking brake not dragging?
(feel the wheels after an easy journey...if any wheel is abnormally hot it could be a sign)
Overuse of a remote start function?

 

I drove a 2000 Honda Accord with a 2.3 liter 4 cyl for 10 years before buying my '14 ES 350 brand new. The Honda got 29-30 mpg on numerous cross country highway trips. The Lexus makes 31-32 mpg on the same trips, which pleasantly surprised me as the Lexus is a bigger car with a bigger engine. Goes to show how automotive technology has improved in 14 years. I will also note the OP has different engines in his vehicles.

 

Yes of course, that’s why I mentioned in my post that he should be consuming about 1 l less per 100 km than the ES350. That doesn’t seem to be the case though, which indicates that there’s something wrong.