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Oil Grade preferences for your LS3

Discussion in 'VF Holden Commodore (2013 - 2017)' started by SS Flo Rida, Aug 10, 2016.

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  1. SS Flo Rida

    SS Flo Rida Active Member

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    I'm wondering if anyone has up spec'd their engine oil from the recommended Dexos 5/30? I've recently heard different opinions and of guys running a 5/40 grade non Dexos. Interesting... So peeps what's the good oil??
     
  2. bigjim92

    bigjim92 Active Member

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    You want an oil that has a SN rating, basically.
    You can't go wrong with something from Penrite, Castrol, Nulon, Liqui Moly, Royal Purple, to name a few.

    I run the Penrite 5w30 Dexos rated oil at present. Once the car gets a few kms on it I'll be switching over to a 5w40 or 10w40 from Penrite.
    Penrite also do a 5w40 Dexos 2 rated oil. While aimed at diesel, it can be used for petrol engines too.

    A lot of people like Castrol Edge 10w60.
     
  3. OzTurtle

    OzTurtle Active Member

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    I stick with Mobil1 5W30, with a oil and filter change between each scheduled service interval.
     
    426Cuda and markalan1two like this.
  4. Smitty

    Smitty Well-Known Member

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    ... I do a Penrite 5W/30 + filter change very 5000 on the R8
    with the dealer doing Mobil 1 5W/30 every 15,000 (or 3rd change if you like)

    have to say the Mobil1 at the dealer is getting exxie...... :(
     
  5. SS Flo Rida

    SS Flo Rida Active Member

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    Thanks for your comments Gents. Interesting Big Jim I talked to a guy with a cammed NA VE Maloo last week and he uses the 10/60.
    I have also used the Dexos2 Penrite in my last 6L VF and found it was good. Apparently it's dexos1 compliant and I'm thinking with now 35k on the clock it may be a good option. I've noticed since the camshaft install the lifters are noticeably chattery at about 1500-2000 rpm and I'm hoping it may reduce this a little at least
     
  6. bigjim92

    bigjim92 Active Member

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    Running a thicker oil in a cammed engine can help make things quieter, however you're naturally going to have a noisier valve train.
     
  7. revster

    revster Active Member

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    I switched from Penrite 5-30 Dexos to Penrite non Dexos HPR 5 (5w40) when the supercharger went on because of the extra heat as suggested by my mechanic. Can't tell the difference but it gets changed each 4.5 months (about 4000k).
     
  8. blackve76

    blackve76 Well-Known Member

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    What lifters? My head cammed 6L has morel tie bar lifters and calls for 5w 40 max weight oil
     
  9. VESSVBLACK

    VESSVBLACK Active Member

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    I changed to 10/tenths penrite 10-40 , after ringing penrite tech line, for a modified LS3/L98 engine, running aftermarket cat converters, they recommend using the 10/tenths, better quality oil than there other range they sell. Have noticed the valvetrain in general is very quiet now and car feels abit smoother sounding.
     
  10. SS Flo Rida

    SS Flo Rida Active Member

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  11. SS Flo Rida

    SS Flo Rida Active Member

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    Thanks for the heads up! After looking at the info on Penrite's site it looks to meet or exceed the Dexos standards. Sounds like good stuff
     
  12. Foggsy

    Foggsy Active Member

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    I think the dexos standards are more around emissions and fuel consumption than engine protection which is why I don't use them. I use Penrite racing 10/40 which has about 5 times the zinc and phosphorous protection package than most other oils have including the penrite enviro dexos approved range which would have to meet the GM standards to get the sticker. You also have to bear in mind that GM selecting 5w30 rating may have a lot to do with fuel consumption and also the fact that in the US they do have freezing temps right over a lot of the country so perhaps they require the 5w rating there but isn't necessarily a requirement here but they can get away with 5/30 all over the world....sort of a one size fits all approach.

    In the states a lot of the shops that fit cams use a break in additive that has a massive amount of....you guessed it, zinc and phosphorous, because oil these days is low on it with the race for lower emissions and fuel consumption and they want to protect the cam lobes and lifter tips on first start up.

    Having said that its jut my opinion and could be completely wrong though my engine builder did say they use royal purple (the mid level one) for its "protection" and that its not approved by GM but under a microscope the bores are as clean as a whistle on RP vs worn on GM approved oil.

    If I had a blown car i'd be using either pentrite racing 15/50 or Penrite premium 10/10's 10/50 and running an engine oil cooler particularly if its a PD style charger.
     
  13. revster

    revster Active Member

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    Just talking to my mechanic (who is a performance engine builder ) and he strongly advised that I switch to Penrite racing 15/50 with the mods to the motor. He is dropping my existing Penrite HPR 5 out as he has the car to do the harmonic balancer.
     
  14. bigjim92

    bigjim92 Active Member

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    I ran penrite racing 15w50 in my 6L. Good stuff.
    Eventually I'll chuck the racing 10w40 in mine.
    As stated above, the added protection in these oils is fairly high.
     
  15. revster

    revster Active Member

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    Finished up with Penrite premium 10/10's, 5w/50 in it and a new powerbond harmonic balancer. Why harrop don't supply the better balancer in their SC kit is a mystery to me as the OEM balancer has to come off to have a key fitted to stop any slipping and then reinstalled
     
  16. Smashfist

    Smashfist Active Member

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    I run HPR10 10/60 in my L77 mainly for the valvetrain - with a high duration and decent chunk of lift it's fairly harsh on lifters.

    Zinc typically isn't recommended for stock applications and isn't specified in high amounts for anything fairly recent as the zinc content is no good for modern cat convertors.
     
  17. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    Modern engines with roller cams don't really need the zinc like the old flat tappet cams did, just run a decent oil but one not to slippery so the rings can bed in properly.
     
  18. Smashfist

    Smashfist Active Member

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    For stock valvetrains I agree. For aftermarket, high lift aggressive ramp cams you need all the help you can get - ramp rates combined with a good set of heavy, dual valve springs creates a huge pressure on the roller at the end of the lifter.
     
  19. revster

    revster Active Member

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    I will be dead before the zinc may ruin my 100 CPI cats. I was told if it happens, it takes about 100-150,000 ks.
     
  20. immortality

    immortality Home of the smoky breakfast Bacon! Staff Member

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    What type of roller lifter are you using (bushed, needle roller, forced oiling)?

    At the end of the day running big cams/springs means there not going to give the same sort of service mileage as a stock (or near stock) valve train.
     

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