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mybenz | mysatisfaction Forum Index
   W210 E Class
     Sudden Increase in Fuel Consumption
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ltw
Posted on: 2012/1/10 21:32
Just can't stay away
Joined: 2009/9/6
From: Kuala Lumpur
Posts: 100
Benz Model: W210 E240 V6 y2000
Message:
Sudden Increase in Fuel Consumption
Dear All Mybenz Members,

For the last 6 weeks, noticed that my car's fuel consumption has recorded sudden increase. All these while, I've been using the same grade of petrol from the same company.

Previously, my fuel consumption is not more than RM0.18/km. Average is about RM0.16/km. Full tank can reach 550km. It is always my habit to monitor my car's fuel consumption each time after I refill the petrol and it hovers around the figures above for the past 3 years.

But lately, discovered my fuel consumption has reached RM0.21/km and full tank mileage is only about 490km. For me, that is a lot of deterioration.

Recent services performed on my car were spark plug replacement (12 units) and changed the 2 front tyres. That was nearly 2 months ago.

Please advise, really in a quandary...
Mabel
Posted on: 2012/1/10 21:49
Benzo mania
Joined: 2007/8/7
From: Shah Alam, Cyber Jaya, Sunway
Posts: 20052
Benz Model: S320L, E240, C200
Message:
Re: Sudden Increase in Fuel Consumption
What engine oil are you currently using?

The symptoms of decreased fuel economy is one of the signs of engine sludging. 98-02 engines(in particular the 112(V6) engines) are prone for oil sludge buildup.

Did you noticed a excessive build of carbon around the exhaust tips. If so, this could be the case that your engine is sludging up.

Try switching to a synthetic oil preferably 5W-40 and see if it helps with your fuel consumption.


----------------
Cheers/Mabel

Nothing great was ever achieved without enthusiasm
Take time to read. It is the fountain of wisdom
Membership Number: One Nine Seven Seven

yapso
Posted on: 2012/1/10 23:52
Certified Benzitos
Joined: 2006/12/26
From: Bandar Utama
Posts: 1586
Benz Model: W124
Message:
Re: Sudden Increase in Fuel Consumption
Is the front tyre that you changed same size with the old one? Do you feel the car less power?

Yap
PY55
Posted on: 2012/1/11 7:48
Home away from home
Joined: 2010/9/23
From: SITIAWAN, PERAK DR
Posts: 416
Benz Model: W124 E220 MP
Message:
Re: Sudden Increase in Fuel Consumption
Dear ltw,

Many possibilities. Could be all this while you have been driving against strong headwind which cause lots of resistance thus increase fuel consumption. How about yr trunk...you may have 4 golf sets(full set) with good 1 flite of golfers travel with you to the golf club. Your new tyre may not at the correct pressure.

clarkson
Posted on: 2012/1/11 8:29
Home away from home
Joined: 2010/7/26
From:
Posts: 239
Benz Model:
Message:
Re: Sudden Increase in Fuel Consumption
did u put on weight recently? LOL

PY55
Posted on: 2012/1/11 9:17
Home away from home
Joined: 2010/9/23
From: SITIAWAN, PERAK DR
Posts: 416
Benz Model: W124 E220 MP
Message:
Re: Sudden Increase in Fuel Consumption
That is another factor to consider Clarkson..LOL..on top of that all golf mates travel with him are XL size. Just joking ltw..no hard feeling ya bro. Happy new year to you and family.

renngrun
Posted on: 2012/1/11 9:34
Home away from home
Joined: 2010/7/20
From: Shanghai/Shenzhen/Minsk/Dnepr
Posts: 4455
Benz Model: W210 E320
Message:
Re: Sudden Increase in Fuel Consumption
Take the car for a longish spin. Drive her hard. You're in Penang rt? If the car spends most of its time crawling in city traffic in Penang...it'll be as what you say since carbon will build up faster if the car has never had her legs stretched. Take her for a longish spin to KL ke...Or hantam the Balik Pulau twisties (careful but run her in 2nd-3rd....2nd -3rd). In short, blow out the cobwebs.

If however you've been doing runs and yer consumption's getting bad...have the car looked over. Your Air to Fuel ratio may be outta whack and gotten 'rich' over the years. How's your exhaust ? Sooty or light grey-ish??





----------------
Money Drives Women Horny - Willie Nelson

ltw
Posted on: 2012/1/11 10:48
Just can't stay away
Joined: 2009/9/6
From: Kuala Lumpur
Posts: 100
Benz Model: W210 E240 V6 y2000
Message:
Re: Sudden Increase in Fuel Consumption
Hi Mabel,

I've been using fully synthetic engine oil all these while. So far, I did not notice any excessive accumulation of carbon at the exhaust tip.


Hi Yapso,

The tyres are of the same size and same manufacturer for all the 4 tyres.


Hi PY55,

Tyre pressure is okay and no extra load inside the car. Trunk is empty most of the time.


Hi clarkson,

Body weight is more or less the same, in fact put off some weight recently


Hi renngrun,

Car travel outstation quite often, average once in a week. Can consider your suggestion to take her for a hard spin during one of outstation trip!

Really appreciate the responses from all.
19owner
Posted on: 2012/1/11 13:45
Certified Benzitos
Joined: 2008/5/16
From: Kuala Lumpur
Posts: 4847
Benz Model: W201 and Others
Message:
Re: Sudden Increase in Fuel Consumption
Quote:

ltw wrote:
Dear All Mybenz Members,

For the last 6 weeks, noticed that my car's fuel consumption has recorded sudden increase. All these while, I've been using the same grade of petrol from the same company.

Previously, my fuel consumption is not more than RM0.18/km. Average is about RM0.16/km. Full tank can reach 550km. It is always my habit to monitor my car's fuel consumption each time after I refill the petrol and it hovers around the figures above for the past 3 years.

But lately, discovered my fuel consumption has reached RM0.21/km and full tank mileage is only about 490km. For me, that is a lot of deterioration.

Recent services performed on my car were spark plug replacement (12 units) and changed the 2 front tyres. That was nearly 2 months ago.

Please advise, really in a quandary...


490kms, ok what...

maybe you were caught in a bad traffic situation the pass few days or you've tekan constantly 180kmh during one of your outstation trip?? anyways, keep on monitoring another short while...

oh, do check the fuel lines/hoses/pipes for leaks...any petrol smell?
ltw
Posted on: 2012/1/11 22:21
Just can't stay away
Joined: 2009/9/6
From: Kuala Lumpur
Posts: 100
Benz Model: W210 E240 V6 y2000
Message:
Re: Sudden Increase in Fuel Consumption
Hi 19owner,

For the past 3 years, full tank of RM105 will give me around 570km (about RM0.18/km) consistently. Lately, refill my petrol for about 10 times, and each time it gives the same results, which is RM105 for 490km (about RM0.21/km).

So, strongly believe something is not right somewhere. However, no traces of oil leakage and car's performance is still the same as before.

Really hope I will be able to find out the culprit soon.

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