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#2267115 - 05/21/11 01:10 AM oil for 1970 Trans am
lyncheric Offline


Registered: 09/13/09
Posts: 1
Loc: WA
Im working on a 1970 trans am with a 400 in it. What oil do you guys recommend for it

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#2267117 - 05/21/11 01:34 AM Re: oil for 1970 Trans am [Re: lyncheric]
umungus1122 Online   content


Registered: 02/12/08
Posts: 753
Loc: PA
Rotella 10w-30 semi-syn.
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#2267121 - 05/21/11 01:39 AM Re: oil for 1970 Trans am [Re: umungus1122]
SOHCman Offline


Registered: 03/29/10
Posts: 1058
Loc: USA
+1

Originally Posted By: umungus1122
Rotella 10w-30 semi-syn.
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#2267157 - 05/21/11 06:16 AM Re: oil for 1970 Trans am [Re: SOHCman]
NHHEMI Online   content


Registered: 07/06/07
Posts: 6385
Loc: NH
Royal Purple( their regular 10W-40 SL will work or even better would be their XPR Racing )or Brad Penn 10W-40. You want something with a lot of ZDDP. A diesel oil could be used too but would not be my 1st choice.
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#2267179 - 05/21/11 07:15 AM Re: oil for 1970 Trans am [Re: lyncheric]
xxch4osxx Online   content


Registered: 03/11/09
Posts: 2183
Loc: Cedarbrae, Ontario
I think Rotella T6 5w40 would work well in this application.
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#2267186 - 05/21/11 07:26 AM Re: oil for 1970 Trans am [Re: lyncheric]
electrolover Offline


Registered: 12/04/10
Posts: 3192
Loc: TEXAS
T5 or T6, depending on what grade you need
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#2267243 - 05/21/11 09:00 AM Re: oil for 1970 Trans am [Re: lyncheric]
sasilverbullet Offline


Registered: 08/22/04
Posts: 1166
Loc: San Antonio, Republic of Texas
Chevron Delo 400 LE, 15w-40 and keep the OCI's short. I use it in my 70 Lincoln with a 460. It has the right ZDDP levels.
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#2267252 - 05/21/11 09:09 AM Re: oil for 1970 Trans am [Re: electrolover]
2015_PSD Online   content


Registered: 09/26/10
Posts: 6050
Loc: SE Texas
Originally Posted By: electrolover
T5 or T6, depending on what grade you need

+1 on Rotella
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#2267351 - 05/21/11 12:07 PM Re: oil for 1970 Trans am [Re: lyncheric]
Astro14 Offline


Registered: 10/10/10
Posts: 6985
Loc: Virginia Beach
Stock 400 was a hydraulic (flat-tappet) cam that was pretty mild and I think it spec'd a 10W40.

I would go with an HDEO in 15W40. Depends on your budget, there are some boutique oils specifically designed for flat-tappet cams in older cars, but yours is not one that puts extreme pressure on the cam, so the HDEO would work well. Delo, Rotella, whatever, find one on sale...
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#2267358 - 05/21/11 12:26 PM Re: oil for 1970 Trans am [Re: NHHEMI]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 14374
Loc: South Texas,USA
Originally Posted By: NHHEMI
Royal Purple( their regular 10W-40 SL will work or even better would be their XPR Racing )or Brad Penn 10W-40. You want something with a lot of ZDDP. A diesel oil could be used too but would not be my 1st choice.


^^2nd. RP told me that their 10W40 street oil has the most anti-wear out of all their other street oils. Then there`s also M1`s HM oils. They have 1000ppm of zddp.


Edited by aquariuscsm (05/21/11 12:27 PM)
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#2270193 - 05/24/11 10:25 PM Re: oil for 1970 Trans am [Re: aquariuscsm]
AWESOMO4000 Offline


Registered: 07/01/09
Posts: 48
Loc: Michigan
10w30 Valvoline would be perfectly awesome for that car/engine.

They didn't have to use tractor oil in it back then....heck, your 5,000 mile old oil today is probably better than new oil back then.

The 440 in my 'Cuda ran on 10w30 white bottle Valvoline from 1994-2005 with 0 issues...and that includes sand in the gas tank from when it was sandblasted, and didn't get all of it out. What a mess....

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#2270347 - 05/25/11 07:35 AM Re: oil for 1970 Trans am [Re: lyncheric]
Lost1 Offline


Registered: 09/22/07
Posts: 289
Loc: VA
I'd run dino Valvoline VR1 20W-50- it has lots of ZDDP. Second choice would be Rotella 15W-40.
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#2270351 - 05/25/11 07:39 AM Re: oil for 1970 Trans am [Re: lyncheric]
A_Harman Offline


Registered: 10/01/10
Posts: 6138
Loc: Michigan
Valvoline VR1 10w30 or Brad Penn 10w30.
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#2270877 - 05/25/11 06:16 PM Re: oil for 1970 Trans am [Re: lyncheric]
CATERHAM Offline


Registered: 11/18/05
Posts: 10133
Loc: Burlington, Ontario, Canada

All the 30wt suggestions are fine.
I'd suggest running a modern 5W-30 synthetic such as M1 or PP and bump up the phosphorus level with some Red Line Break In Additive:

http://www.redlineoil.com/Products.aspx?pcid=1

Call or email Dave at RL and he'll advice on proper doseage. One bottle is good for at least 5 oil changes.
Or simply run RL 0W-30 if you're okay with the cost.
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