I get 19mpg all city driving and between 25-28 all freeway depending on how fast im driving. City driving i fill up at about 275 miles and thats like 14-15 gallons.

 

LOL! I get ~14.6MPG around town, and I'm all stock! (200 miles to a tankful) But I drive hard, throttle & brakes pretty much every where. I didn't buy this car for economy. I do get almost 30MPG (400miles) on a tankful on a road trip/all highway driving, cruising between 70-80mph. My other car is a Land Rover that sucks down gas like there's a hole in the tank, so it makes the CL-S6 feel like a hybrid, even when I'm city driving LOL.

 

Don't you mean how SLOW was he driving LOL!

 

I guess I should of said how long was he on the back of a flat bed

 

He's talking about looking at long range mileage over the course of weeks not days...

I've got a log book with every tankfull I've ever put in my CLS, so I can very accurately determine gas mileage... Over seasons, years, over the total length of ownership... etc... I really need to put the data in a DB or at least in an excel spreadsheet...

Driving habits can change from tank to tank. Some weeks I do more highway than city driving...

Taking a longer look at things, I generally get 22 or so MPG over the course of 6 MONTHS... that's enough of a time period to weed out statistical anomalies...

 

There is about 750rpm difference between the manual and the auto at 80

 

Just fueled up yesterday. 354 Mi on odometer, 14.1 Gallons to fill it.

Thats > 25MPG, and all city driving. I'll take it!!!

edit: the only bad part was the $3.34/gallon fuel

 

I actually drove the 210 miles to SF and back to see gc86's exhaust.

and yes, I was driving slow on the freeway. the average was 60 following semis (staying back so rocks dont chip my hood) and with cruise control. There was no point in me driving fast, time was not a concern so might as well take it easy on my car and stretch my dollars. There was 1 stop of traffic there and more bumper to bumper coming back. and i did hit 4k twice. I have a drop in filter with resonator removed but im also driving around with 18's and subs in the trunk.

Plus I just washed my car so I didnt want 200 miles of freeway bugs on my front.

So this shows that if anyone really tries to get good mileage on the freeway, they can and they can go much higher then mine with stock tires, empty trunk, no quick accels and no traffic. 40 mpg can be broken.

 

sounds like your car is in 4th gear versus 5th if you have the auto

2K should get you 70+

 

it does not matter if you do it on a weekly basis or a tank by tank basis........ i see milage ranging from 23.7 all the way up to 27.6 depends upon what has to be done for the week. I keep a log and the average is about 25 mpg

 

Not with the 6 speed. Rpms are higher

 

How do you figure? If you drove 450 miles on a tank, and refilled with about 15 gallons (which would mean you were nearly empty) that would be 30mpg.

You'd have to get about 600 miles to a tank to get 40mpg.

 

40 MPG x 17.1 gallons = 684 miles to the tank...yeah, I don't think so.

 

Oh its entirely possible....

If you don't reset the trip odometer


You guys crack me up with your pictures.... They prove nothing

I could show you a pic of my car with a 3/4 full tank of gas and 300 miles on the trip odometer, but does that really mean I drove that many miles on that amount of gas?....NO

This thread is about as useless as the oil debate threads


Oh one more thing... Just because you "may" get 200 miles on your first half tank of gas doesn't mean you will duplicate that on your second. Our fuel gauges are non-linear. If I fill my tank to the max I can drive for 50 miles before the gauge moves off the "F". Thats not going to happen again at the half tank marker

 

If i get 220 to the half on the hwy i will easily get another 200 out of the 2nd half. I get upwards of 400 to 450 on the hwy all the time. And thats to the low fuel light, not a dead empty tank. (and i have broke the 500 mark before)

 

well if i got almost 38 mpg, why cant others with stock tires, no system and not hitting traffic or 4k. i bet if i had all of the about i would get 40+. 210 miles and i only used about 5.5 gallons.

 

I bet you could get 40mpg in the CL, but you'd have to drive between 45 and 55 mph though the entire tank to do so, w/o any hills/stops/quick acceleration and the wind to your back. Driving highway speeds or in city traffic, impossible.

 

You didn't almost get 38 mpg. Just look at how many miles are on your odometer when you refill (Hopefully you zero'd it when you filled the car last) and divide that by the number of gallons it takes you to fill.

You got 210 at the half way point, and half our tank is 8.55 gallons.


210/8.55 = 24.56MPG. Therefore you can estimate you gas mileage to be around 25mpg.

However, as stated before, just because your needle is near half, doesn't give a good indication of how much gas you've really used.

edit: I'm going to say it's impossible with real world driving situations to get 40mpg. 32 has been done, but with the CL the best gas mileage is in the 30mpg range, not the 40mpg range. This isn't a hybrid or 4 cyl. vehicle.

 

Needle at half doesnt show anything, but it gives a good estimation on how hard you drive. More so, you can fill up the tank and divide miles/gallon used, then you get MPG

 

Thank you for repeating what I just said.

 

well lets just disregard how many miles per half tank. lets do it by how many miles per gallon. you can disregard my picture but i will still be at 37.93 mpg.

 

well i was doing 60 with a little bit of traffic. is that considered highway speeds?

 

Please provide whatever math formula you are using to come up with this. I'd enjoy working it out.

 

I got 37.03 mpg. before I left for SF, I filled up, reset my trip cal. and drove. For anyone living in northern california, they know that it is around 200 mile to SF and back from Sacramento. I was not at halfway on my tank yet and besides when you fill up full, it goes past the F mark anyways. Just disregard my picture. I will just tell you how many miles I droe (210.2) and how many gallons that it took to fill up again to the same about before my trip (5.542 gallons) Then this way can I calculate my MPG? Just disregard my picture. everyone knows that the correct way to calculate mpg is to fill up full, drive, fill up full again and divide miles driven by gallons of gas used to drive those mile. 210.2 miles/5.542 gallons=37.93miles per gallon.

 

1. Fill up full (until it clicks off)
2.Reset trip odometer
3.Drive!
4.Fill up full again
5.Divide miles on the trip odometer (miles driven) by gallons used to fill up again (on the pump)
(Miles driven)/(Gallons used to drive those miles) = Miles Per Gallon
6.Enjoy! try different drving styles to see your MPG change.

I do this calculation in the car before I even leave the pump. I sit in the car and do it on my phone calculator. its fun and interesting

 

^^^^ wow, that's a lot, i wish my car could get that
what car do you have cl-p or cl-s? manual, or auto?

 

lol yea sorry. i know i get carried away sometimes and my posts are always a chapter long. no lie, proof is above.

01 CL-S Auto. Didnt change the plugs but have drop in. also got 18 inch rims and a system in the trunk. so like i said before, better can be achieved

 

Well your math seems to be right, hard to believe, but you seem to know how to calculate properly...out of curiosity, are you running tires sized differently than stock? That can sometimes make it look like you put more/less miles on your car than you actually did.

I mean, I'm not in disbelief but that's about 5mpg more than anyone has EVER reported getting in a CL, if I remember right.

 

hard to believe? its a pretty easy calculation but i hope that wasnt an insult. yea, im running 225/40/18.

Thanks! I was wondering what the record was!

 

Well that tire size accounts for some of your mileage. Your speedo is actually reading a little faster then what you are moving so your miles will add up alittle faster

 

Someone with a 6 speed should drive an entire tank at 35 mph in 6th gear...

 

i think it would get better mileage around 45-50 in 6th.

 

yes and I also know that our odometers are also racking up faster then they actually are. but in the 210 miles ive driven, it cant be that much of a difference. even if it was 10 miles then it doesnt make that much of a difference in the mpg calculation.

 

ive heard that maximum mpg is somewhere around 65 mph but there is always different factors

 

@65-70 is about correct.

i just got about 185 on half a tank... AND i went up to angela's crest and stayed in 3rd/4th gear to take those turns =D.... plus i have a 150-200 lb audio system in my trunk.. i guess the mods are helping out a little. i/h/e and monoblock rims

 

So has anyone used any of those additives that is suppose to reduce the friction in your engine, trans, and fuel system and increase mileage? I was thinking of doing that as I did it to my diesel and it gave me a 15% increase.


I don't know if I can list the brand name here to see if anyone has used it or would?

 

I know these are not the additives you are talking about but I used seal foam and come Carb/FI cleaner and that made my bike run smooth and gave me a few mile per tank increase.

 

Is that what the different colored mark on some speedo's signifies? Max Efficiency?

 

we used to have a early ninties taurus and i think it was marked at 55. but i think that signals when overdrive engages. i dont remember, its been almost 9 years!

 

I think they were marked at 55 because that was the speed limit of freeways. My dads old f 350 had that.