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MPG
Posted: Fri Mar 06, 2015 5:14 am
by BLKEB9006
From older to newer posts I've read, 20+ MPG on the highway is what we should see on an SSEi and is okay to start your modifications. Currently I'm only seeing 18.4 on a 50 mile round trip to work a day, all highway. I have done everything on the maintenance list and more, except o2 sensors. Always premium, 93 octane, tires are inflated, throttle body cleaned last summer, new TPS and IAC. Any ideas or suggestions?
Re: MPG
Posted: Fri Mar 06, 2015 8:06 am
by maxi426
Make sure coolant temp is 180-190 going down the road. Bad thermostat will kill MPG. That car should be able to hit 30 MPG reading instant MPG on the dash.
Re: MPG
Posted: Fri Mar 06, 2015 8:25 am
by BLKEB9006
Did a coolant flush and a new thermostat before winter in August. If I put on cruise control at about 65 it's reading around 26 maybe.
Re: MPG
Posted: Fri Mar 06, 2015 1:20 pm
by nos4blood70
Is this hand calculated or via the DIC?
Re: MPG
Posted: Fri Mar 06, 2015 3:53 pm
by BLKEB9006
The DIC
Re: MPG
Posted: Fri Mar 06, 2015 4:51 pm
by mikeluscher159
Hand calculate. DIC isn't always quite right.
Check for vacuum leaks, and clean your MAF sensor.
Re: MPG
Posted: Fri Mar 06, 2015 9:07 pm
by BLKEB9006
From what I understand there's only 1 true vacuum line? Anyone have pictures of it maybe from start to finish?
Re: MPG
Posted: Sun Mar 08, 2015 12:22 am
by BLKEB9006
Nevermind, found a diagram. Also found that the lines are not the issue. My AC compressor has a slight leak not sure if that would make a big impact. Haven't hand calculated the mpg yet but reset the DIC tonight and only getting 23. Highway speed limit 70.