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  1. #1

    Default Synthetic oil and MPG. Does it help

    I all. I am thinking of switching to synthetic oil. I have been told this will increase my gas mileage. Anyone have advice? 07 Silverado 1500 classic 5.3L.
    Thanks in advance.
    Last edited by cmight1; 04-20-2011 at 05:37 PM.

  2. #2
    murdog94's Avatar
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    Feb 2008
    Cloquet, Minnesota, United States
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    Yes it will increase your milage. about .25mpg at most. really with todays oils there isnt much to be gained. However synthetics usually have a longer life, and cost less as a result.


    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  3. #3


    Are you planning on using it in the trans, etc?
    1998 K1500 Ext. Cab 4.3 5spd
    Amsoil, CIA

    2007 Harley Davidson Vrod
    Amsoil, Vance & Hines 2into1, K&N Topless,
    Screamin Eagle Racetuner, StageII cams,
    Carbon fiber front fender, and a few more lil goodies:wink:

  4. #4


    From what I've heard, In order to see any significant increases in mileage, you have to use synthetic fluids for all of the fluids in your truck (engine oil, transmission, diff fluid etc...)
    04 ECSB Custom silver & grey, Soft 8's, BFG KO's, ReadyLift Leveling Kit, Hellwig front sway bar, K&N filter, DeeZee EZ-Down, Rhino liner, Alpine CDE103BT, Rockford 6.5's, 12" V.A.T. Hammer Pro in a Subthump box, Alpine PowerPack amp, Hifonics amp, BackRack w/ 55w 5000k HID KC Daylighters, KC light bar with 4 KC Slimlites, UWS toolbox, Shaved Antenna mod, Black Bowtie, LED backup, license plate, dome lights & 3rd brake light

  5. #5


    I was going to try it in the engine and trans.


    ---------- Post added at 08:05 PM ---------- Previous post was at 08:03 PM ----------

    If you all have any other good info to inprove mileage I'll take it. I did put a K&N intake on. I got a increase of 1.5mpg. Every little bit helps these days.

  6. #6


    Keep those tires inflated and the trucks front end aligned. As TELORVEHC said, you should change all the fluids, engine,trans and diff. I use Mobil 1 fluids in all our trucks.

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