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  #1  
Old 10-03-2017, 07:51 AM
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Default Engine oil additive

Since modern engine oils lack (sufficient) ZDDP, i was looking for some alternative.
I found here an additive branded " Comp cams", which is an engine break-in additive which seems to have ZDDP in it. Anyone who can recommend this? (quite expensive stuff)
And what about Militec 1? Could this be a substitute for the ZDDP?
I´m using Motul classic 20W50, which should be for 1950-1970 engines, but it doesn´t state anything about ZDDP and even motul couldn´t tell me.
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Old 10-03-2017, 08:48 AM
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you should be able to look up the additives to any oil you are considering, and thus take the guesswork out of it.

You can also simply buy a container of additive and do something like one container per oil change. See

https://zddplus.com/ (good background reading here)

Hemmings will sell you their version all set to go:

https://www.hemmings.com/classic-oil/20w50

John
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Old 10-03-2017, 08:51 AM
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Melling M-10012 was the product that we used. If it helped I couldn't say.
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Old 10-03-2017, 09:25 AM
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Thanks for the answers guys. My biggest problem is that we have very limited options here in Brazil and shipping internationally makes it very expensive.
The "Comp cams" stuff is for sale here for an equivalent of USD 62 for 12 FL. OZ.
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Old 10-03-2017, 09:34 AM
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the oil you have MIGHT be ok. Check it out. The limitations were primarily aimed at 10W-30 as it was used in the cars with catalytic converters (the source of the issue). 20W-50 may not have been impacted and thus might have sufficient levels of zinc and so on.

You may well be able to find the levels online.

20W-50 for classic motorcycles like Hondas and so on comes to mind as good. Valvoline 20W-50 Racing Oil.

If you send me a PM with your regular email address, I will send some notes I took years back from some oil guy on
a car program that went in to specific levels need for flat tappet motors.
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Old 10-03-2017, 09:43 AM
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Just wondering if people are routinely using an additive.
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Old 10-03-2017, 10:02 AM
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Couldn´t find any specific info from Motul itself, but the oil specification is API SF, which should have at least 1500 PPM of ZDDP. Strange that Motul doesn´t give any information on the actual levels.
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Old 10-03-2017, 11:26 AM
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perhaps they buy it from someone else and slap their own label on it.
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Old 10-03-2017, 11:31 AM
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Quote:
Originally Posted by Infinite Monkeys View Post
Just wondering if people are routinely using an additive.
I usually use oil that has ZDDP already in it like Rotella T 15W-40.

John
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Old 10-03-2017, 04:49 PM
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1959 Convertible

My machinist got me a case of Monolec Ultra 15-40. I used it in a 62 F100 flat tappet motor and have it in this 352. Mfg by Lubrication Engineers Inc.
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