Hey John...here's a few things to think about.
The weather has been cooler so even though you aren't letting it sit and
warm up it still takes a little longer for the engine to reach operating
temp. (meanwhile running richer) I'd definitely use a 195 stat during the
winter.
Have you checked your tire pressure? It may have dropped a couple psi.
The extra 300 lbs will make some difference.
Our winter formula gasoline may not be as efficient.
Obviously the K&N didn't hurt you and if the Flomaster is stock size
inlet/outlet I wouldn't think that would hurt you either. But that
sound.......well, it's hard not to step into it a little more, isn't it?:-)
RayB
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
> -----Original Message-----
> From: owner-dakota-truck@bent.twistedbits.net
> [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of DakotaJohn
>
> I recently installed a drop-in K&N filter and a Flowmaster '50' series
> muffler on my 2K V6 Dak. I was averaging 19.5 mpg (70%hwy/30%city), now I
> have dropped to about 17.5 mpg. I figured at first it was just me
> listening
> to the new sound of the exhaust, but I'm sure that I'm not getting on it
> anymore than usual now and I have lost 2mpg. Does anyone have any
> ideas? The
> only other mod I have is Bosch Platinum+4 plugs and they have been in for
> awhile(while I was getting the 19+). Also, it hasn't been cold
> enough yet to
> let her sit and warm up so that isn't the culprit. Unless the 300lbs for
> winter did it, I added that about mid-tank. Thanks for any tips, John
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