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Generation III Internal Engine
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Old 06-11-2009, 02:34 PM   #1
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Default Whats a good oil to use for flat tappet cam engines?

I recently installed a 350 engine in a 76 vette. Had it rebuilt locally. They gave me some Brad Penn break in oil to prevent premature cam wear, it has a non roller cam. On the 1st oil change, we went with Royal Purple. Its due for another LOF & I am gonna go with a different brand. I am just worried if I dont use a good enough oil, the cam will wear. Should I not be so concerned about which oil to use now since I already ran it first with the break in oil?
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Old 06-13-2009, 12:59 PM   #2
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Valvoline VR1 Racing Oil or Brad Penn Oil. They both got the "zinc" additive for flat tappet motors!
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Old 06-13-2009, 01:23 PM   #3
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Joe Gibbs as well with the zinc
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Old 06-13-2009, 02:30 PM   #4
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Amsoil Dominator® Synthetic 10W-30 Racing Oil (RD30)

AMSOIL Dominator Synthetic Racing Oil features an additive package heavily fortified with zinc and phosphorus for superior long-term wear protection. Designed for maximum durability, it ensures critical engine components are protected for the duration of the race. Dominator Synthetic Racing Oil’s superior additive technology provides unmatched durability in extreme conditions. In addition, its high levels of zinc and phosphorus additives make it ideal for street rods, muscle cars and other vehicles with flat-tappet cams.
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Old 06-13-2009, 02:34 PM   #5
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Also their AMO line. 10W40
SAE 10W-40 Synthetic Premium Protection Motor Oil (AMO)
Formulated for use in both gasoline and diesel engines. Offers multi-functionality and excellent wear protection. Ideal for applications where the extra protection of a higher viscosity oil is desired. Excellent for motor homes and older vehicles, as well as most types of modern equipment. Also compatible for use in motorcycles.

Performance specifications include: API SL/CF, CI-4 Plus
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Old 06-13-2009, 04:05 PM   #6
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Rotella works as well.
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Old 06-13-2009, 08:21 PM   #7
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Quote:
Originally Posted by nocooler View Post
Rotella works as well.
x901, but you want to run a break in oil formula when breaking in the motor, don't let it idle and keep the rpm's above 2k rpm's for the first 10 mins. Other than that, you're good to go. I would recommend rotella after the first 10 mins of break in. It's cheap and still have a good quantity of zinc for flat tappets!
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Old 06-14-2009, 05:32 PM   #8
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Just use any good oil and change it at regular intervals and it won't be an issue. Flat tappet cams have been used for many many years and it's not uncommon to get 200 - 300K miles out of them. And oil is better now than it used to be. The only thing different as far as taking care of them vs. a roller is the first start up and 5 minutes of run time after install. It is critical to do this right to establish proper wear patterns on the lifters/lobes.
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Old 06-14-2009, 05:55 PM   #9
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Quote:
Originally Posted by DaveX View Post
Just use any good oil and change it at regular intervals and it won't be an issue. Flat tappet cams have been used for many many years and it's not uncommon to get 200 - 300K miles out of them. And oil is better now than it used to be. The only thing different as far as taking care of them vs. a roller is the first start up and 5 minutes of run time after install. It is critical to do this right to establish proper wear patterns on the lifters/lobes.
Oil is worse now than it ever was. Oil today has more "detergents" in it that keep the motor "clean." That's not a good thing with the older flat tappets. I believe all the motors today are roller motors, which don't need as much zinc and phosphorous to get the same level of protection as with a flat tappet motor.

You must use a zinc oil additive or an oil with a high zinc/phosophorous content in a flat tappet motor in order to prevent premature cam/lifter failure, period.
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Old 06-14-2009, 05:59 PM   #10
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Quote:
Originally Posted by DaveX View Post
Just use any good oil and change it at regular intervals and it won't be an issue. Flat tappet cams have been used for many many years and it's not uncommon to get 200 - 300K miles out of them. And oil is better now than it used to be. The only thing different as far as taking care of them vs. a roller is the first start up and 5 minutes of run time after install. It is critical to do this right to establish proper wear patterns on the lifters/lobes.
Wow, thats some good advice
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Old 06-14-2009, 06:06 PM   #11
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rotella is the best for the money. But Joe Gibbs break in oil is the best. IMO. Don't use Royal Purple break in oil.
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Old 06-14-2009, 06:49 PM   #12
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Why no Royal Purple?
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Old 06-14-2009, 07:13 PM   #13
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Quote:
Originally Posted by 69LT1Bird View Post
Amsoil Dominator® Synthetic 10W-30 Racing Oil (RD30)

AMSOIL Dominator Synthetic Racing Oil features an additive package heavily fortified with zinc and phosphorus for superior long-term wear protection. Designed for maximum durability, it ensures critical engine components are protected for the duration of the race. Dominator Synthetic Racing Oil’s superior additive technology provides unmatched durability in extreme conditions. In addition, its high levels of zinc and phosphorus additives make it ideal for street rods, muscle cars and other vehicles with flat-tappet cams.
+10 on this, AMS OIL ALL THE WAY!
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Old 06-14-2009, 09:37 PM   #14
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Comp makes an additive for break in that ive used before.
Click the image to open in full size.
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Old 06-14-2009, 09:39 PM   #15
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Quote:
Originally Posted by JPH View Post
Valvoline VR1 Racing Oil or Brad Penn Oil. They both got the "zinc" additive for flat tappet motors!
what he said
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Old 06-14-2009, 09:39 PM
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