Oil recommendation for 400 hp sbc flat tap cam

Discussion in 'Engine Topic' started by GNLMAN32, Nov 8, 2015.

  1. GNLMAN32

    GNLMAN32 New Member

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    I have a 70 camaro with the original 350 block, it has vortec. Heads and an Eldelbrock rpm cam and lifters. I did the break in with the zinc additive etc. and drained that oil. I changed the oil to Royal purple synthetic 50 weight. I have about 1500 miles on it and it runs great. I need to change the oil and now I am questioning if I should continue running Royal purple synthetic with all of the reading up on zinc and synthetic oil in muscle cars and flat tap cams. Any advise?
    Thanks Larry
     
  2. lumpy12

    lumpy12 Veteran Member Lifetime Gold Member

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    I am a Valvoline kind-o-guy and I like their VR1. It has good zinc levels. I also prefer multi-grades, like a 20-50 instead of a straight weight
     
  3. COPO

    COPO Veteran Member Lifetime Gold Member

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    Synthetic oil should not be used until you have at least 5000 mi. I dump mine once or twice a year and use conventional oil. You should ask your engine builder what the max viscosity you can run with your bearing clearances.
    You need a min of 1200 ppm of zddp for FT non roller cams so you don't experience lobe wear.
     
  4. Dogwater

    Dogwater Veteran Member

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    VR-1 10/30!!! I don't know why Advance Auto, Auto Zone an other auto parts stores put 20/50 & 50 wt. VR-1 on the display shelf an not 10/30. I tell the guy behind the counter to order me 2 cases of 10/30 VR-1. There's only 6 qts. in a case. Cost like 40.00 a case. You can use Royal Purple or an additive but VR-1 is just as good an cheaper.
     
  5. 77 cruiser

    77 cruiser Veteran Member

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    15-40 Delo would be OK no need to run 50 weight.
     
  6. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    I use VR-1 50 wt racing oil with either a bottle of lucas hwy duty oil stabilizer or a bottle of Hyper lube zinc replacement additive

    I live in the Desert region so summer time temps can reach 118 deg plus and the reason for thicker weight oil . Oil pressure 65-75 psi cold psi , 45 -55 psi cruise warm
     
    Last edited: Nov 8, 2015
  7. JWZ28

    JWZ28 Veteran Member

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    Castrol 10W-30 or 10W-40 and a bottle of zinc additive has served me well at every oil change.
     
  8. COPO

    COPO Veteran Member Lifetime Gold Member

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    IMO 10w-30 is like water once at operating temp in an old performance engine. Just listen to all the oil drain back into the pan on shutdown. I don't go less than a 10w-40 wt.
     
  9. Camaro16

    Camaro16 Veteran Member

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    10w30 quaker state defy and a bottle of additive, there is a listing of zddp in different oils if you search on google.
     
  10. JONESYFXR

    JONESYFXR Veteran Member

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    I like the Lucas Hotrod oil myself.
     

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