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Oil for my 65 mustang. #5332019 01/25/20 04:12 PM
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old1 Offline OP
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I won't need any for some time, as I have a few gallons of the old hddo oil from before anybody started to lower the ZDDP in it, but at some point I will have to start to use more modern oils. What I am wondering is if since my engine is a well broke in 65 200 ci stock engine, is it even necessary to use an oil with more than the SN amount of ZDDP?

Last edited by old1; 01/25/20 04:13 PM.

2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 FOR SALE
Re: Oil for my 65 mustang. [Re: old1] #5332020 01/25/20 04:15 PM
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spasm3 Offline
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Flat tappets? I'd want more zinc than sn.


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Re: Oil for my 65 mustang. [Re: old1] #5332029 01/25/20 04:29 PM
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RDY4WAR Online Content
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The OEM cam of the 200ci doesn't really "need" additional ZDDP. It won't hurt, but isn't a necessity. The cam lobes have weak enough ramps, paired with weaker OEM valve springs, where the 800 ppm API SN/SN+ limit on phosphorus is sufficient.

I will of course recommend Driven GP-1 10w-30 or 15w-40 as it is formulated specifically for such an application. Mobil 1 0w-40 would be a decent choice also.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Oil for my 65 mustang. [Re: old1] #5332061 01/25/20 05:20 PM
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old1 Offline OP
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I kinda thought that the SN limits would probably be ok, but then some oils have considerably less than the 800 limit. I guess I probably shouldn't worry about it till I am on my last jug of what I have, because by then the oils on the market will probably far different than they are now. Not to mention that I may not even be driving anymore by that time, as I have enough for at least 5 years. Since I only change it at most once a year, sometimes only every 2 years, as I only drive it about 1000 miles a year, and all warm weather, and mostly long drives.


2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 FOR SALE
Re: Oil for my 65 mustang. [Re: old1] #5332090 01/25/20 05:55 PM
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ka9mnx Online Content
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Back in '65 most oils contained less, and less effective, ZDDP than modern oils.


2005 Ranger 3.0 - SuperTech Syn 5w-30/Motorcraft
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1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Oil for my 65 mustang. [Re: old1] #5332114 01/25/20 06:15 PM
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Nitronoise Offline
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Rotella 10w 30 HDEO for semi's has a big zinc loading over950 PPM works well with older muscle cars and the detergent package keps them clean as a whistle


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Re: Oil for my 65 mustang. [Re: RDY4WAR] #5332123 01/25/20 06:25 PM
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OVERKILL Offline
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Originally Posted by RDY4WAR
The OEM cam of the 200ci doesn't really "need" additional ZDDP. It won't hurt, but isn't a necessity. The cam lobes have weak enough ramps, paired with weaker OEM valve springs, where the 800 ppm API SN/SN+ limit on phosphorus is sufficient.

I will of course recommend Driven GP-1 10w-30 or 15w-40 as it is formulated specifically for such an application. Mobil 1 0w-40 would be a decent choice also.


I second the M1 0w-40 recommendation as it is relatively cheap and very easy to find.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2020 Grand Cherokee SRT - Ravenol SSL 0w-40, FRAM Ultra
Re: Oil for my 65 mustang. [Re: old1] #5332141 01/25/20 06:41 PM
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JeffKeryk Offline
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Any decent 10w30 or Shella Rotella 15w40.


2018 Tesla Model 3, Medium Range Battery
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Re: Oil for my 65 mustang. [Re: old1] #5332145 01/25/20 06:48 PM
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super20dan Offline
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the ford 6 isn't oil picky. the small block 289 and 302 might be a different story. I got lifter ticks from time to time with these engines. all my ford 200,s 250 and 170 were happy on most anything


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Re: Oil for my 65 mustang. [Re: old1] #5332165 01/25/20 07:15 PM
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Originally Posted by old1
I won't need any for some time, as I have a few gallons of the old hddo oil from before anybody started to lower the ZDDP in it, but at some point I will have to start to use more modern oils. What I am wondering is if since my engine is a well broke in 65 200 ci stock engine, is it even necessary to use an oil with more than the SN amount of ZDDP?

For flat tappets you want a 10W-30 or 15W-40 -- in other words an oil with a thick base oil, as the flat tappets temporarily shear the VIIs, which, as a result, cannot thicken the oil as intended. Don't worry about ZDDP -- modern oils have a better antiwear package than oils of the past with high ZDDP.

Amsoil ACD 10W-30/SAE 30 is a monograde, and it's as good as it gets for a 10W-30 -- it has a thicker base oil than that of a 15W-40.


2020 Toyota Prius Prime XLE plug-in hybrid, 2ZR-FXE engine, ~ 4,000 mi
TGMO 0W-16 SN/RC Japan
OEM spin-on oil filter Japan
Re: Oil for my 65 mustang. [Re: old1] #5332193 01/25/20 07:49 PM
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fraso Offline
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You could probably use a Starburst oil and not have any long-term wear issues with it. I use 10W-30 Petro-Canada Duron SHP HDEO in my slant six because it is also suitable for API SN. See Engine Wear.

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