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Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

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  #1  
Old 11-09-2010, 10:57 PM
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Default what kinda mpgs should a 6.5 get?

im just woundering what kinda of mpgs a 6.5 diesel should get?
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  #2  
Old 11-10-2010, 11:01 AM
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i know my 97 3500 auto 2wheel drive with 4:10 only getting 15 mpg and 8 mpg towing a 16,000lb 5th wheel and i can't seem to get any more then that and have done eveything i could just get that but now i hear ppl getting 18 to 21 mpg

Crazy's Sig:Traded for 94 F-350 turbo blow the motor up little red
1997 3500 Ext Cab 2 Wheel Drive 300,000 plus miles New Trans with up grades for towing Rebuild Rear end 4:11 with
new axles,new injectors, 4" Exhaust , 5" tip, PMD Moved to front Bumper TM 18psi boost,,new LP,boost,EGT and trans gauges and Max E Tork T-Series
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  #3  
Old 11-10-2010, 01:42 PM
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yeah im gettin the same and i hear ppl gettin 20 at least with them
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  #4  
Old 11-10-2010, 06:51 PM
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me driving around town i get 15

Woody35's Sig:1997 Chevy K1500 4X4 EC/SB L56 6.5TD/4L80E
KOJO Tune, GM-8 Turbo gated @ 15 psi, 2100 PSI Pop Pressure Bosch Injectors,
Bosch Duratherm Glowplugs, Steel Braided Oil Cooler Lines,Relocated D-Tech PMD,Tekonsha Voyager Brake Controller
Autometer Gauges, ARP Headstuds, K47 Air Box , Flowmaster Crossover & 4 Inch Diamond Eye Exhaust
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  #5  
Old 11-14-2010, 10:43 PM
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between 18 and 20 with a C3500 single cab and 4.10s. the taller tires i put on helped the low gears on the highway

tyler111991's Sig:1988 F250 XLT Lariat, ZF 5 speed, 4x4, 7.3 N/A IDI, manual glowplug switch
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  #6  
Old 11-14-2010, 10:50 PM
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between 18 and 20 with a C3500 single cab and 4.10s. the taller tires i put on helped the low gears on the highway

Read more: what kinda mpgs should a 6.5 get?

what size tires are you running and is your truck s/w or d/w
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  #7  
Old 11-14-2010, 11:11 PM
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Originally Posted by tyler111991 View Post
between 18 and 20 with a C3500 single cab and 4.10s. the taller tires i put on helped the low gears on the highway
you must drive really slow
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Old 11-14-2010, 11:20 PM
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  #9  
Old 11-15-2010, 12:07 PM
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I get 19 hwy empty, 16 towing my car @ 70mph, and around 16 city.....I drive like a grandpa I never really go over 2k rpm, unless I need to lose a pesky dodge ram or f150

_hollywood's Sig:1998 GMC 2500 W/T 2WD RC/LB 6.5L
107k miles
K&N filter in oem box, removed turbo silencer
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former state owned truck
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  #10  
Old 11-16-2010, 05:27 PM
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pesky dodges,

yamadude's Sig:94 Crew Cab Dually 6.5 Turbo, automatic. no mods
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