Fuel Economy with OFT?
 

Hey everyone. I'm looking for anecdotes from people regarding fuel consumption with the various base tunes for the Openflash Tablet. (Not including E85, I know that E85 is about 75% as economical as 93.)
Lemme know what your engine mods are with your anecdotes please!
I'm looking at buying an OFT to hold me over until I get flex fuel through ecutek in a year or two. However: I'm going to be doing a LOT of highway miles over the summer and want to know whether or not I'm going to need to flash back to stock tune to save gas. I am on the stock header.

While cruising AVCS, timing, fuel, etc are the same as stock.
At WOT you get more power for less fuel, depending on the car.
Everywhere else in between you get slightly better efficiency.

MPG will also depend on your driving style and mods you have on your car. after I got my sticky summer tires, I noticed that my MPG dropped from 29 MPG to 27-28 MPG. if you have a real front splitter and rear diffuser (like Velox) you will also gain MPG (Velox has a thread about it).

as for just changing tunes, I didn't really notice any difference from my stage 1 OFT to stage 2 tune (with headers and overpipe installed). I do a mix of freeway and city driving though, and never a full tank purely freeway so I truly don't know what my real freeway MPG is

I average 30-32 MPG on a Stage 1 91 octane tune. 90% of my driving is highway going around 70 MPH.

On the stock tune with 100% highway I managed to get 35 MPG.

MT also.

Stock - 28 mpg

Stage 2 UEL 91oct - 26.2 mpg

OFT guys have flex fuel system working thanks to ztan, not sure when it will be released to public ask the oft guys

I am running the following mods:


AEM Intake (not using AEM chip)
Raceseng light weight crank
JDL UEL header
2.5" Spec D exhaust


My MPG is in flux between 32 mpg with some spirited driving during daily driving. to 37 MPG hyper-miling on a stock tune.

Since my OFT, I am 32.8 - 36.7 mpg on avg

I must be doing something wrong. I average 24 and some change. Stock except stage 1.

My Average MPG
All stock: 29.0
OFH + Stg2 UEL 91oct: 28.0

https://docs.google.com/spreadsheets...P78/edit#gid=0

Mine is about the same. Do you let your car warm up before driving? I think it is still counting the fuel consumed and the 0 miles it went so it drops the average quite a lot .

Drive cycle is more important than anything else, likely nothing is wrong with your car, you just sit in traffic or at stop lights/signs more than most people in this thread.

My mileage plummeted not when I changed tires or tuned it, but when I moved, no more freeway cruising meant I went from a ~28 mpg average down to ~24 mpg, but I cut 40 miles off my commute every day.

I just put OFT on my car, but I don't expect that to change that I get 10mpg while tracking or autox-ing or >30 mpg cruise control on down the freeway without traffic.

Yes it does count fuel being used while not moving, so sitting in dead stop traffic you're lowering your average. But sitting in the car letting it warm up for 2 minutes is nothing compared to sitting in 15 mph traffic for an hour or setting cruise control at 65.

If anyone doesn't believe me, reset your average fuel gauge, drive around the block, (<1 mile) then stop and let it idle and watch that number drop like a rock.

I get in the 6.5-7.0 L/100km range in pure highway driving, 225 AD08R's, K&N panel filter, Perrin 2.5" catted front pipe, 2.5" resonated cat-back and OFT stage 1 93.

Your mileage is going to be more affected by wider/stickier tires than the tune.

k&n drop in filter
lightweight pulley set
uel header & OP
oft stg 2

After the uel header and stg 2 tune, no change in mpg here. 100% city driving with very short fast trips under 5 minutes and occasional 15 minutes, I'm at 20-21 mpg. Highway driving I will still easily get into mid thirties.

I thought I was getting 30 MPG, because I was going with what the display reads. But I started doing the manual calculations every fill up.

70% highway driving. 28 MPG

-Injen intake
-gutted cats, Berk dual exit
-OFT stage 2 93