ZDDP In Older Engines

[Bill H2]

I know this subject has been addressed before, but I still have some questions. I have an older Hi-Performance Ford engine (1965). I have always used Castrol 20-50 and added 1/2 bottle of GM-EOS additive. I have been told that the oil sold in Firestone stores is made by Kendall and has the ZDDP needed. I stopped at the local store, sure enough, the Firestone brand oil's label says Kendall, SL SJ, SH. Part Number 7138.
Does anyone know if this is in fact the correct oil for an older engine and would it be a better choice than the Castrol? The car gets driven very few miles.
Thanks
Bill

 

[Gary Allan]

It's got the right ratings

Whether it's a better choice than Castrol has got me swinging. Depending on how long you go between driving bouts, I would think that being idle without running would erode more stuff.

 

[Jim 5]

Consider an HDEO like Rotella 10w30 or 15w40 if you like the heavy stuff. I use the former in my Bronco's 302.

 

[ryan2022]

Valvoline racing oil has the ZDDP additive as well. It says its formulated for ANY vehicle requiring the weight and specs, so not just for race use. It comes in 20w50 as well as 10w40 I beleive.

some Deisel 15w40's have it as well.

 

[KA426]

http://www.bradpennracing.com/

 

[TallPaul]

Valvoline VR1 last I looked came in 10w30, 20w50 (you can mix these two for a 15w40ish brew), as well as straight weights 30,40, 50, and 60! Now if the zddp is what their data sheets indicate, we have ourselves a really nice oil.

 

[morris]

moe in wichita ks
i have spent some time on the internet looking at oil info.
1. valvoline prememum blue 15 w 40 lots of zinc. there are
other oils with zinc, but they are hard to find in wichita.
2. purolator oil filter be sure it a "pure one" it will have a "p" in the part no.
3 go to zddplus.com and get more zinc


now iam not saying that all the other proucts are junk.
BUT do YOUR OWN recearch. my moto: "you cant have to
much zinc"

 

[Ken2]

Is there a reason you feel your factory-stock engine needs more ZDDP than provided in modern oil? The latest oil spec requires tougher testing for both engine longevity and engine cleanliness, as well as oil durability, than ever before.

Yes, the ZDDP has been reduced to protect the latest emission control equipment, but that doesn't mean the oil isn't adequate. Other chemicals along with the permitted amount of ZDDP combine for full protection.

Kendall oil is good, exactly the same as its stablemates, 76, Conoco, & Phillips, and nothing special. Buy it because it is good and the price right, not because you think you're getting anything different. It meets exactly the same specs as every other oil with those same specs on the label.

There is nothing wrong with BP's Castrol brand oils, and nothing special about them, either.

If you want a more robust oil, yes, get a dual-purpose oil like a 15w40 diesel/gasoline engine oil rated SM as well as CJ-4. Again, nothing special about any of the major brands.

 

[Taylor]

Originally Posted By: morris
my moto: "you cant have to
much zinc"


actually you can!

 

[FrankN4]

If the car does see a lot of idle time, I would recommend a synthetic oil. There are three excellent oils available.

You could use Mobil 1 15W-50. It has a ZDDP of 1200, good HTHS, 4.56, and good cold flow, not a 0W-20, but good cold flow. It is not overly thick as it has a 100C cSt of 18.1 and a 40C cSt of 131.2.

Amsoil has an excellent 20W-50 called ARO. It has a ZDDP of 1378, HTHS is 5.0, 40C cSt is 115.7 and 100C cSt is 18.8. Another good flowing oil.

The thinnest oil I would consider is Amsoil 10W-40 AMO. It also has 1378 ZDDP, 4.3 HTHS, 40c cSt of 85 and 100C cSt of 14.4.

Do you have a 390-401 or a 406? My older sister had a 65 Galaxie 500 XL, her first new car. I believe it had a 352, 4 barrel.

 

[Taylor]

if you want the cold flow I would get mobil 1 0w40 and boost zddp with crane cams superlube. That way you get the best of both worlds.