Join Date: Jul 2012
Location: Sacramento area
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Mileage can vary by a pretty large margin. Here are some things to consider:
2wd or 4x4
What's your gearing
Are you running loaded or unloaded
How's your truck running?
E brake sticking?
How faithful have you been on maintenance (oil, filters, fluids etc.)
You running big tires with a lift?
All these things (and more) can have an impact.
Also, did you get better mileage and then start getting worse?
Did you ever get baseline engine load and compare to now?
Some trucks are just pigs audits hard to explain why, while some need maintenance. Need more info to be helpful.
2005 6.0 Lariat Crew Cab 4x4 Short Bed
SCT X3 Tuner, Looney Tune from Quick Tricks
Bulletproof EGR Cooler (I live in CA, smog mecca)
FICM with Atlas40 from FICMrepair.com
Updated Standpipes, Dummy Plugs and STC
4" Turbo Back Magnaflow Exhaust
DC Power 185 amp alternator and wiring upgrade
CAT EC-1 Coolant
Dashboss Monitoring including pyro and fuel pressure