oil with out zink some say youneed to add oil with zink in 50-60s' engines others say no
so far ive been getting away with bargain brand multy grade 10w30 am I looking for trouble |
Re: oil with out zink Every body has a different opinion about this. I heard from a noted Yblock engine builder that any oil with a 30 weight or greater has enough zinc in it for Y blocks and I would assume flatheads. So I 10/30, 10/40, 20/50 should be sufficient without an additive. 60's oil had less ZDDP (zinc blend) that most of the oils noted above. He uses Valvoline 10/30 or 10/40 conventional in all his builds
But as I said, every one has a different opinion on this. |
Re: oil with out zink I'm on the Zinc side of the fence.
I was using an older Rotella 10/40 oil but switched to Valvoline VR1 Racing/High Zinc 20/50 ~High performance formula for flat tappet engines~ "am I looking for trouble" Valve train wear may or may not take a while. How many miles do you drive it a year? Some off-shore sourced parts (valve adjusting screws) can fail in a few weeks no matter which oil is used. 50's, 60's & some 70's motor oil used to contain zinc (& phosphorus) to help reduce wear at the high stress pressure points in the valve trains of older engines. But with the advent of unleaded fuel, catalytic converters, hydraulic and roller lifters... the zinc & phosphorus wasn't as needed and it contaminated emission equipment... so it was removed. I think of high Zinc oil as insurance. Might never need it or know that I did, but I don't want the cam to go flat either. More info at this link... https://www.ctci.org/engine-oil/ . |
Re: oil with out zink Quote:
I am with you on this. I use Valvoline VR1 also in my avatar 302. One oil change a year won't break the bank!! |
Re: oil with out zink For an older engine back when 30WT was the go to oil you might want to think Lucas Plus, a lot of the cheap oils today have very little zddp so as to satisfy newer emission standards. https://lucasoil.com/pdf/Zinc_Values_MotorcycleOil.pdf
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Re: oil with out zink The ZDDP was not completely removed. It was just reduced. The higher performance engines of the late 50s through the early 70s needed 1200 PPM of ZDDP for better longevity of flat tappet valve train components. The first reduction brought the levels down to 1000 PPM and further reductions reduced it to 800 PPM so it's still in there but at a reduced amount.
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Re: oil with out zink I use Lucas Hotrod and Classic. I would rather be safe then sorry.
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Re: oil with out zink Quote:
You're doing great. There is enough zinc in the oii you're using. One requirement for oil to meet new standards is that it be backward compatible to meet previous standards. So no need to worry unless you have a high zoot race engine with aftermarket extreme pressure valve springs. |
Re: oil with out zink Todays Valvoline premium blue 15W-40 deisel oil has 1270ppm zinc. I've been using it for many years. My 292 has a zillion miles on it and still runs great.
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Re: oil with out zink You might want to look at this discussion about oil
http://forums.y-blocksforever.com/Topic151765.aspx |
Re: oil with out zink I agree with dmsfrr, I use zinc in my Y-block with 10-30. I figure that it is cheap insurance. $15 every 3000 miles is not going to break me! I add it with every oil change.
I also used zinc in my '81 SBF 302 with Mobil 1 Synthetic 10-30. added the zinc every filter change(3K mi) , changed oil every year and we drove the car, as I remember about 7-8K miles a year. |
Re: oil with out zink Anything more than 1200 ppm starts to become detrimental to the engine parts. This was where the API set the limits for good reason (for automobile engines). ZDDP has corrosive properties so don't get too carried away with it. Most diesel engines have larger & heavier duty parts than car engines so they did use higher amounts. The latest API CK-4 rating has reduced levels of ZDDP. Some of them are skirting the API CK-4 rating by listing the engine protection test results. They don't pass for that rating yet but if they eventually do then they won't have much more ZDDP than car engine oil has. They will just use other additives like they have for years. Diesel truck oil is overkill for most automobiles. The stuff helps with the high perfomance engines that started to show up in showrooms in 1958 but the earlier designs really would only need it for initial break in. After that, they would work just fine. The old flatheads don't need it at all. Rompum stompum engines with high compression and high lift, flat tappet cams will be the only ones that benefit from high ZDDP levels. Roller cams don't need high levels.
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Re: oil with out zink I use 20/50 Brad Penn only in my 59 Corvette .
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Re: oil with out zink 80's oil had less than 800 PPM
Go here for some facts https://www.ctci.org/gilsgarage/engi...-oil-and-zddp/ Quote:
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Re: oil with out zink,no don't,used zink I use Valvoline VR1 ,it is among other things made for flat tappet cam engines.:D
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Re: oil with out zink The scare from the lack of ZDDP has been around since the mid 70's. Most people didn't realize it and most Ford engines didn't suffer from it. Both small and big block Chevys are the ones that suffer the most with flat tappet cams. 1 out of 5 of those cams went flat even before the ZDDP was reduced. I don't get to concerned about the oil in my old Fords, but my Chevy friends do
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Re: oil with out zink Quote:
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Re: oil with out zink Quote:
I was about as gullable as a blonde haired dude could get, but as Abraham Lincoln once said--you can't believe everything on the internet because there is no way to prove that it's true....lol |
Re: oil with out zink Is that Valvoline VR1 non-detergent
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Re: oil with out zink No, VR-1 has detergents
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