What oil to use - Team Camaro Tech
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post #1 of 20 (permalink) Old Oct 15th, 16, 05:39 PM Thread Starter
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What oil to use

I've searched but missed the information I need. I just bought a '68 that had no service records and the seller didn't know much about the car (it was her Dad's). So my question is, what oil should I use since I don't know what's currently in it? I prefer to use synthetic but I hear about problems if you switch to that on an older car that has always had conventional oil. I don't even know the exact mileage of the car but I assume it is 115k. Would I be safe using synthetic or should I use conventional?

'68 RS
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post #2 of 20 (permalink) Old Oct 15th, 16, 06:15 PM
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Re: What oil to use

Jim, I use Rotella 15-40. It has more zinc in it that other oils I have used in the past.
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post #3 of 20 (permalink) Old Oct 15th, 16, 07:14 PM
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Re: What oil to use

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Originally Posted by zdld17 View Post
Jim, I use Rotella 15-40. It has more zinc in it that other oils I have used in the past.
No Jim, I would not use a synthetic oil but would use any of the high zinc type oils like Brad Penn (what I use), Joe Gibbs oils, Hemmings, etc.. The diesel oil might be a good choice as suggested as well but I again use Brad Penn oils in all our older cars and engine builders I know use utilize the same Brad Penn oil.
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post #4 of 20 (permalink) Old Oct 15th, 16, 07:25 PM
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Re: What oil to use

I would use a conventional 10W-40 in cooler weather and 15W-40 in the summer.
For flat tappet cam you need a min of 1200 ppm of ZDDP.

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post #5 of 20 (permalink) Old Oct 15th, 16, 09:19 PM
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Re: What oil to use

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Originally Posted by 68camaroz28 View Post
No Jim, I would not use a synthetic oil but would use any of the high zinc type oils like Brad Penn (what I use), Joe Gibbs oils, Hemmings, etc.. The diesel oil might be a good choice as suggested as well but I again use Brad Penn oils in all our older cars and engine builders I know use utilize the same Brad Penn oil.
X2 on the Brad Penn oil, especially if your have a flat tappet cam.
I use the Brad Penn partial synthetic, never had a problem, the 10W-30 grade has 1565 ppm ZDDP.
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post #6 of 20 (permalink) Old Oct 16th, 16, 06:20 AM
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Re: What oil to use

What engine is in it? Was it rebuilt with new valve seats? Does it have a newer roller cam? I noticed you are in Phoenix so usually a heavier weight. If nothing was ever done to the car everyone above is right, get oil with zinc otherwise synthetic could be fine.
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post #7 of 20 (permalink) Old Oct 16th, 16, 06:44 AM
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Re: What oil to use

Brad Penn here too.

Wiped a cam using modern oils. Didn't take long either.

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post #8 of 20 (permalink) Old Oct 16th, 16, 07:57 AM Thread Starter
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Re: What oil to use

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Originally Posted by bigblockragtop View Post
What engine is in it? Was it rebuilt with new valve seats? Does it have a newer roller cam? I noticed you are in Phoenix so usually a heavier weight. If nothing was ever done to the car everyone above is right, get oil with zinc otherwise synthetic could be fine.
As far as I know nothing has been done to the 327/210 in it. I'm figuring a 15-40 is fine here because even in the dead of winter it's ok in the garage.

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post #9 of 20 (permalink) Old Oct 16th, 16, 08:25 AM
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Re: What oil to use

I'd use 10w30 from Pepboys, Walmart, etc. Change the oil and filter every 3k miles.
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post #10 of 20 (permalink) Old Oct 16th, 16, 08:35 AM
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Re: What oil to use

Valvoline VR1 for flat tappet.
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post #11 of 20 (permalink) Old Oct 16th, 16, 08:42 AM
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Re: What oil to use

Quote:
Originally Posted by 68camaroz28 View Post
No Jim, I would not use a synthetic oil but would use any of the high zinc type oils like Brad Penn (what I use), Joe Gibbs oils, Hemmings, etc.. The diesel oil might be a good choice as suggested as well but I again use Brad Penn oils in all our older cars and engine builders I know use utilize the same Brad Penn oil.
Jim, Rotella T is not a synthetic oil. While it doesn't have as much as the Penn, Gibbs oil its still has zinc in it. Reason beaing, try finding Gibbs or Penn oils on the long distance tours in case you need some. However, I carry my own Rotella T with me. Truck stops have all the Rotella you will need.

Don
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post #12 of 20 (permalink) Old Oct 16th, 16, 02:38 PM
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Re: What oil to use

Vr1 in either 10/30 or 20/50 is your best bet, all of the stores have it, no other choice in my opinion. O'Reilly has it for $5 a quart this month

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post #13 of 20 (permalink) Old Oct 16th, 16, 04:56 PM
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Re: What oil to use

I have seen cases of guys going to a oil with lots of detergents into older model cars. I saw where someone had a very old , 1950's Olds that got the bright idea of changing oil and picking up a good quality oil like Pennzoil ,with all those Z7 detergents. Soon after the change, those detergents went to work, removing all the gunk in an old car, thus oil pressure dropped to something like 5 psi at hot idle.
That motor had to be pulled.
Later after the oil change, an older person indicated that the hi detergent oil cleaned everything up, and caused excessive bottom end clearances. A better choice of oil would have been a lawn mower type oil, that did not have all the additives to keep the motor clean.
Probably even better would be to us new clean oil that has been re-refined. Yes, its out there.

Remember guys, I am talking about something that was done before some of you younger guys were ever born.

Don
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post #14 of 20 (permalink) Old Oct 18th, 16, 02:47 PM
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Re: What oil to use

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post #15 of 20 (permalink) Old Oct 19th, 16, 11:12 AM
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Re: What oil to use

Quote:
Originally Posted by Vega$69 View Post
Valvoline VR1 for flat tappet.
Even that isn't quite enough zinc for my liking. I use it in a pinch but I cringe every time.
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Sold:
1968 Base hardtop 250 with a P̶G̶ built 2004r
Offy intake
Holley 390 CFM carb
Langdon split header to a 2.5" exhaust
Mild cam
Custom interior
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