|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
09-22-2019, 06:15 PM | #1 |
Member
Join Date: Jun 2013
Location: Texas
Posts: 84
|
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? Sent from my iPhone using Tapatalk |
09-22-2019, 06:55 PM | #2 |
Senior Member
Join Date: May 2010
Location: East Hartford, Ct
Posts: 5,898
|
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.
__________________
DON'T RECALL DOING SOMETHING FOR MYSELF BASED ON SOMEONE ELSE'S LIKES OR DISLIKES |
Sponsored Links (Register now to hide all advertisements) |
|
09-22-2019, 07:12 PM | #3 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,304
|
Re: Oil Detergent - Rislone ZDDP
You don't need it on a stock (or close to it) flathead.
|
09-22-2019, 07:16 PM | #4 |
Member
Join Date: Jun 2013
Location: Texas
Posts: 84
|
Re: Oil Detergent - Rislone ZDDP
Ok thanks! I didn’t realize Shell Rotella has ZDDP included.
Sent from my iPhone using Tapatalk |
09-22-2019, 10:42 PM | #5 |
Senior Member
Join Date: May 2010
Location: CLAYTON DE
Posts: 1,283
|
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.
__________________
Enjoy yer day. Tom Hate can't fix what it started. |
09-22-2019, 11:10 PM | #6 |
Senior Member
Join Date: May 2015
Posts: 8,081
|
Re: Oil Detergent - Rislone ZDDP
Sponsored Links (Register now to hide all advertisements)
__________________
The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
09-23-2019, 12:05 AM | #7 |
Senior Member
Join Date: Apr 2015
Location: Sweden
Posts: 3,045
|
Re: Oil Detergent - Rislone ZDDP
|
09-23-2019, 07:10 AM | #8 |
Senior Member
Join Date: Jun 2016
Location: Pahrump, NV
Posts: 373
|
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 |
09-23-2019, 08:50 AM | #9 | |
Senior Member
Join Date: May 2010
Location: Snohomish,WA
Posts: 1,030
|
Re: Oil Detergent - Rislone ZDDP
Quote:
The problem today is the engineers and chemists are more focused on federal emission regulations than preventing wear on our old engines. |
|
09-23-2019, 09:18 AM | #10 |
Senior Member
Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,778
|
Re: Oil Detergent - Rislone ZDDP
Looking at the longevity of engines from the last 15 or 20 years(often 300-400,000 miles) I'd say what the petroleum engineers have done is to the benefit of our old engines! The only time extra zinc is needed is if we're running high RPM high pressure valve springs. Remember, there was no zinc in oil in the flathead's day!
|
09-23-2019, 10:55 AM | #11 |
Senior Member
Join Date: May 2010
Location: on the Littlefield
Posts: 6,156
|
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
|
09-23-2019, 01:34 PM | #12 |
Senior Member
Join Date: May 2010
Location: Granger (Northern) Indiana
Posts: 1,520
|
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!
|
09-23-2019, 07:15 PM | #13 | |
Senior Member
Join Date: May 2010
Location: Snohomish,WA
Posts: 1,030
|
Re: Oil Detergent - Rislone ZDDP
Quote:
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 |
|
09-24-2019, 02:27 AM | #14 |
Senior Member
Join Date: May 2010
Location: Manawatu, New Zealand
Posts: 1,416
|
Re: Oil Detergent - Rislone ZDDP
Agreed but there is no doubt the quality and functionality of todays lubricants is light years ahead of that used in the day. I have run restored BMC engines in cars for 50000 miles with no engine work . My mechanic grandfather spoke of the same engine in the day regularly needing a valve job at 10000 miles and the bottom end at 30000 miles Something has changed and in this case it isn't the engine -Karl
__________________
Such a fine sight to see-Its a Girl, My Lord, in a Flatbed Ford slowin' down to take a look at me. |
|
|
Sponsored Links (Register now to hide all advertisements) |
|