My son clocked his milage at 22 today. It's a 240 D automatic. Aside from clean air filters, tire inflation, and good driving habits, can I do something to tweak the IP or check the timing of it to possibly increase the milage? He does 1/2 of his driving on short trips to and from school and the engine doesn't have time to warm up properly. What are some other's 240 milage claims?

For mixed driving that sounds pretty good actually.

i would expect about 17 18 around town and 23 to 25 max highway with a slushbox.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Yes, for short trips on a cold engine with an automatic 22mpg is good. Highschool guys aren't known for good driving skills, especially with a low power car. Most will treat the thorttle as an on/off switch no matter what you do.

Its a good way to check floor pan inegrity.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

That applies to pretty much EVERY 240D driving situation. It's the only way you can drive it and not get flattened by a semi.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

half throttle , full throttle its not much difference.

The throttle in a 240d, especially the automatics is more like a placebo thermostat!

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

22 MPG is not bad for city driving in stop and go traffic. I get close to 40 on the highway, but about 32 is my average. However, I'm burning biodiesel which is a lubricant moreso than diesel. I also adjusted my timing to 27 BTDC to make up for Biodiesel being sluightly less combustible than Diesel.

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http://www.mobile-phone-solutions.com Advice on cell phone signal antennas and amplifiers.

Fuel lubricity makes no difference in economy.

I agree, I almost never go past about 1/2 or 3/4 throttle on the 240. You can feel when it's out of power, more peddle doesn't do anything except make a little extra noise. The only exception is a long highway hill where it will eventually wind out that last little bit of power/speed.

Of course it does! It reduces friction. My idle went up once it got through the tank and flushed all the dino out. That only happens when friction is being reduced. Reduced friction= better fuel economy.

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Save and enlarge for explanation of financial crisis!

http://www.mobile-phone-solutions.com Advice on cell phone signal antennas and amplifiers.

Can of worms officially re-opened.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

The best economy I ever got in my TDI was when I was running 5% bio. Got 56.3 that tank...

EDIT: But now that I think about it that doesn't have much to do with the inline pumps on our Benzes as they are lubricated by the engine oil, not the fuel like the rotary pumps fitted to VWs.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

That is the solvent effect cleaning the injectors and lines that changed how it runs. Fuel lubrication does not affect fuel economy.

Reduced friction= better fuel economy is true but not measurably from the fuel.

The fuel's lubrication quality affects pump and injector wear.