Oil Detergent - Rislone ZDDP Oil being used in my 1934 is SAE 40 straight weight from Shell Rotella. I’ve heard this detergent, Risolne (picture below) is a great zinc supplement detergent to add to the oil.
Any thoughts or review of this product? https://uploads.tapatalk-cdn.com/201...2799efcb7c.jpg Sent from my iPhone using Tapatalk |
Re: Oil Detergent - Rislone ZDDP The Shell Rotella appears to already have ZDDP in it.
The ZDDP is not a detergent but enhances lubrication. If you do some research on line there are reports that say too much ZDDP can be detrimental to an engine. |
Re: Oil Detergent - Rislone ZDDP You don't need it on a stock (or close to it) flathead.
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Re: Oil Detergent - Rislone ZDDP Ok thanks! I didn’t realize Shell Rotella has ZDDP included.
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Re: Oil Detergent - Rislone ZDDP The need for zinc grew out of factory heavy valve spring, high lift, high performance camshafts. These street applications from early '60s thru the early '70s demanded higher zinc levels to insure valve train longevity.
While research shows some zinc is good, it also tells us that too much zinc can cause excess wear. One of our senior gurus ( Ol' Ron ) speaks of spring pressure of about 45 or 50 lbs. ( I can't recall which ) as all that is needed. |
Re: Oil Detergent - Rislone ZDDP Wondering if ZDDP is beneficial to Babbitt bearings......Hmmmm
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Re: Oil Detergent - Rislone ZDDP Snake oil my friend. Oil companies spend billions of dollars formulating oil additives engineered by chemists. By using additives your are basically trying to outthink engineers who have spent their entire lives formulating additives. I know I'm not smart enough to do that.
Our engines were built and ran during a time when lube oils were very simple in design. About 2 and a half years ago went on the internet and looked for oils with the highest ZDDP package. AT THAT TIME Castrol GTX 20-50 was rated in the top 5 unless you went to the designer "racing" oils. Having said that I'm sure that has changed by now. Anyway, all oils in the top 5 exceeded the ZDDP minimums necessary to protect old engines |
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The problem today is the engineers and chemists are more focused on federal emission regulations than preventing wear on our old engines. |
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Re: Oil Detergent - Rislone ZDDP When you add additional additives to oil with additives you can end up with something worse if the additives clash with each other
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Re: Oil Detergent - Rislone ZDDP The best advice I've learned about engine oil is if you think you need an additive, you're using the wrong oil! :)
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We have also changed metals , gone to roller valve train ,variable valve timing, timing belts etc. The engines built today are every bit as different as the oils |
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