20 mpg Ext Cab 4x4 5.3! (Full Version)

Chevrolet >> Chevy Trucks, Vans & SUV's >> Silverado

20 mpg Ext Cab 4x4 5.3!

  

Waboom!! -> 20 mpg Ext Cab 4x4 5.3! (1/22/2007 9:49:34 PM)

    Well just posting say (happily) that today I calculated my gas mileage and got 225 miles on 11.25 gallon of regular gas. After owning my Silverado 1500 Z71  X cab 4x4 for a few months I always got 13 14 15 mpg average.  And I am not really a lead foot. I checked it 4 tanks in a row with consistant results. Then I ran 2 tanks in a row of super fuel injector cleaner and changed the oil over to Amsoil 5w- 30 , Changed the transmission over to Amsoil Universal Sythetic ATF and switched the rear end to Amsoil Severe gear 75w 90. Not hauling I am now getting 20 mpg. I am immpressed! 

  
engine2 -> RE: 20 mpg Ext Cab 4x4 5.3! (1/23/2007 12:59:18 AM)

That is impressive.  I have always heard good things about Amsoil.

Did you use a programmer as well?

Waboom!! -> RE: 20 mpg Ext Cab 4x4 5.3! (1/23/2007 6:47:23 PM)

No pragramming it is  Bare bones stock. I have 3.73's in back and Hwy tread tires the truck has 40,000 miles on it. 

red69 -> RE: 20 mpg Ext Cab 4x4 5.3! (1/23/2007 8:50:35 PM)

I get 19-20 in my 05' Z71 after I switched to Mobil 1.

Rod Man -> RE: 20 mpg Ext Cab 4x4 5.3! (1/23/2007 10:14:56 PM)

How does changing to sythetic motor oils and diff oils help gas milage? i may want to do this give me some more info please, which motor oil and weight, and same for diff. how many miles do you go on sythetic oil before changing ?
Thanks, Rodney

Waboom!! -> RE: 20 mpg Ext Cab 4x4 5.3! (1/23/2007 10:48:32 PM)

   
Very easy... less friction in the driveline. and not as thick during warmup. basically the motor and trans will run with the same ease when cold as they would when nice and warm, ya dig? But also,  I do strongly recommend Amsoil not:  wally world mobil one.

Rod Man -> RE: 20 mpg Ext Cab 4x4 5.3! (1/23/2007 11:01:25 PM)

thanks, for the info. i dig it man, lol
btw how many miles between changes ?
what weight gear oil. front ? and rear ?

Waboom!! -> RE: 20 mpg Ext Cab 4x4 5.3! (1/24/2007 7:12:04 PM)

I used Amsoil Severe Gear 75 W 90 in the rearend with NO friction modifier because mine is the G80 auto locking rear differential and your not supposed to add anything per owners manual. other wise I think a guy might need the limited slip additive from GM for the standard differential. As for the front axle its still conventional oil since I dont use  4WD all the time maybe 10 or 12 times a year.

red69 -> RE: 20 mpg Ext Cab 4x4 5.3! (1/24/2007 9:03:22 PM)

  Mobil 1 is factory fill in Corvettes and Vipers and will do just fine in your Chevy truck.  I use 5w-30 in my Z71 and change at 10,000 miles. 

Waboom!! -> RE: 20 mpg Ext Cab 4x4 5.3! (1/24/2007 9:29:06 PM)

quote:

ORIGINAL: Rod Man

btw how many miles between changes ?
rod man:This might sound crazy... but I change my Amsoil every 12 to 14,000 miles. Look into it,  Amsoil is the way! check out performanceoiltechnology.com

  

Page: [1] 2   next >   >>

Return to Chevrolet Forum home page or view the Full Version of this page.