levind

Tire pressure does matter! I make the same 120 mile highway trip twice a week... cruise control set at 65 with ac on. With the tire pressure set at the factory recommended 29/33, I usually get 37-38 mpg. This morning I pumped up the pressure to 31/35, and got 39.6mpg (everything else being equal).

-tokz-

39.6? seems that mine can go only to 26-27.. and this already improve since the service..before the service it only goes up to 20s

or is it u guys have a cdi?

any suggestion?

CE750

26 or 27 is Sweet for an E320 V6.... we're talking CDI I-6 numbers (39+).. don't worry.

ajm0824

Well After 5 Hrs of driving on the timer and bumping up the tire pressure... avg is at 17.5mpg

16 City
20 highway

Still kinda horrible imo.

Gonna try fuel addetive just for the helluv it

last month I was at 21 avg... still not sure where it all went wrong.

CE750

Use TECHRON by chevron.... the rest is just snake oil.

X72

Please let us know what happens ajm0824. The only other simple thing I can think of is bad gasoline, or perhaps gasoline with ethanol. Make sure to double check your fuel economy figure by filling the tank and dividing the miles driven since last fill-up by the amount of fuel you put in. I wouldn't rely solely on the trip computer figure.


If the MPG remains low, then there is likely a problem. A stuck brake caliper or some parking brake problem. Really bad alignment. Or some engine control problem.

William
2003 E320

ajm0824

Thanks for all your help. will do.. gonna wind the tank down... refill with Techron and based on miles and gas used... calc the mpg..

Thanks again... & I'll keep u posted.

-tokz-

ahaha..thanx..it shocked me for a while though..

CE750

that was my reaction too when I saw the Monroni sticker at the dealer as I was walking around to pick out the E500 I wanted

But you should have seen how shocked I was after the test drive