20 mpg Ext Cab 4x4 5.3!
January 22nd, 2007, 11:49 PM
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20 mpg Ext Cab 4x4 5.3!
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!
January 24th, 2007, 12:14 AM
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RE: 20 mpg Ext Cab 4x4 5.3!
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
Thanks, Rodney
January 24th, 2007, 12:48 AM
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RE: 20 mpg Ext Cab 4x4 5.3!
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.
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January 24th, 2007, 9:12 PM
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RE: 20 mpg Ext Cab 4x4 5.3!
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.
January 24th, 2007, 11:29 PM
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RE: 20 mpg Ext Cab 4x4 5.3!
ORIGINAL: Rod Man
btw how many miles between changes ?
btw how many miles between changes ?