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Thread: OIL Discussion

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  1. #1
    Join Date
    Jul 2008
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    OIL Discussion

    Ok, this isn't about what type of oil you run. Its about 5w30 Mobil 1 in vettes.

    Our trucks and vettes are LSX engines. But why in the vette do they say it is mandatory to run Mobil 1?

    Same roller valve train right? If that's the case, shouldn't we all be using Mobil1 or some other full synthetic?
    2013 CC 5.3
    81 C10 LS1 project

  2. #2
    Join Date
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    I may be wrong but I think mobil 1 is recommended for our trucks too. I know that is all that mine has ever had in it.
    2005 black Yukon XL SLT - traded in for me wife's new Fusion (GM sucks these days)
    2002 black Yukon SLT (the skinny sister)
    1969 green Pontiac GTO (Layla, AKA the black sheep)

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  3. #3
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    Quote Originally Posted by tanz45 View Post
    Ok, this isn't about what type of oil you run. Its about 5w30 Mobil 1 in vettes.

    Our trucks and vettes are LSX engines. But why in the vette do they say it is mandatory to run Mobil 1?

    Same roller valve train right? If that's the case, shouldn't we all be using Mobil1 or some other full synthetic?
    cause its a money game that GM made agreement with mobil 1 to run that oil in the vettes
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
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    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
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  4. #4
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    All I Run Is Mobil One In My Truck But Thats All Ive Ever Ran In It
    06 rcsb, 6two, 231/235, 4.11, pacesetter, 80e, 14 bolt, Nelson tuned
    2011 rcsb 6two swap in the works with 6l90 and boost
    FARMTRUC CAN GARGLE PEANUT BUTTER

  5. #5
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    i can't run full synthetic cause by the time i got my truck it already had 85,xxx miles on it...so i run 50/50

  6. #6
    Join Date
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    Quote Originally Posted by jcormier89 View Post
    i can't run full synthetic cause by the time i got my truck it already had 85,xxx miles on it...so i run 50/50
    you can run full synthetic. its just not recommended to switch back and forth from standard to synthetic. thats what ive been told. got my truck with close to the same miles. she has 160k on the clock now with zero problems. gary

    2005 SS AWD, 22" REPLICAS, VOLANT CAI, MAGNAFLOW EXH, 1/2 DROP- NEXT: TUNE, SHIFT KIT, SERVOS, TRU-COOL
    (SOLD)2000 ECSB HARLEY DAVIDSON EDITION. 2''/4" DROP, 20" BUDNIKS, COWL HOOD, MOLDED ROLLPAN, CLEARS, DROP IN K&N, MIT, TAYLOR WIRES, LOUDMASTER EXHAUST
    1991 RCSB S10 355 SBC, 700R4, 8.5" 10-BOLT, 18"/19" C6 Z06 WHEELS, 4"/5" DROP, MAGNAFLOW DUALS W/X-PIPE, FULLY SHAVED W/ CADDY LIGHTS: NEXT-LSX 370/PT88/TH350

  7. #7
    casey23 Guest
    i run 15/40 in my turbo truck... but when i run it in my DD trucks they make noise..... so now i just run 10/30 ..

  8. #8
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    15/50 Mobil1 here per my tuner. He knows a smidge about what works I guess.

  9. #9
    Join Date
    Oct 2008
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    Scott, Arkansas
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    5w30 Mobile 1 in my SSS since I've owned it.
    2005 Silverado SS AWD
    AEM CAI, ARH LTs, HD-2 shift kit with vette servo, Circle D 278mm 3200 stall Madtunesracing.com street tune (MTR now has a Dynojet 248 chassis dyno)

    13.82 @ 94.92 w/1.83 60'

  10. #10
    Join Date
    Mar 2007
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    5/50 Mobil 1 in the Camaro, and 10/40 on the truck.

    I tried a few synthetic oils, same weight, always return to M1

    The only guide I have for this decision is my engine oil temp gauge, Mobil 1 keeps it 20 degrees below the other synthetics on same conditions.

    No wise guy, but if temp is lower, I assume, friction is lower, so will be wear out.

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