List of Flat-Tappet Oils
04-06-2012, 10:38 PM
#522
Race Director
Not ignoring the results just discounting the relevence of a film strength test in reguard to flat tappet cam protection, especially high ramp rate, high lift cams, high spring pressures and solids. Film strength is important, more so in a cold start situation where the oil has drained down and no oil pressure. This is where film strength really comes into play. That, and the sacrificial layer on the highly stressed parts, is the only protection the internals have until you establish oil pressure. This is why all film strength testing is done at 100 degrees as per ASTM.
04-07-2012, 09:41 AM
#523
Premium Supporting Vendor
AMSOIL's primary flat tappet cam engine recommendation (per the Tech Service Bulletin link in the original post):
AMSOIL Z-ROD 10w30 Synthetic Motor Oil (Product Code ZRTQT)
(zinc – 1440 ppm, phosphorus 1320 ppm)
AMSOIL Z-ROD 20w50 Synthetic Motor Oil (Product Code ZRFQT)
(zinc – 1440 ppm, phosphorus 1320 ppm)
AMSOIL's Secondary Recommendation (per the same Tech Service Bulletin):
AMSOIL SAE Synthetic Premium Protection 20w50 (Product Code AROQT)
(zinc – 1379 ppm, phosphorus 1266 ppm)
AMSOIL SAE Synthetic Premium Protection 10w40 (Product Code AMOQT)
(zinc – 1378 ppm, phosphorus 1265 ppm)
They also list some diesel and racing oils, but I did not include those as they didn't seem to pertain to the point of this thread (automotive oils for street applications needing high ZDDP).
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C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Ordering Information (Retail sales using reference #1206638 benefit the forum.)
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C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Ordering Information (Retail sales using reference #1206638 benefit the forum.)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
AMSOIL Catalog
Last edited by C66 Racing; 04-07-2012 at 10:37 AM.
04-07-2012, 09:50 AM
#524
Premium Supporting Vendor
Do you mean TBN?
Total Base Number is a measure of the oil's resistance to acidic engine combustion byproduct buildup in the oil. Higher indicates the oil can be used longer. Long life oils which have very high TBNs. But, lower TBN is not a bad thing, particularly for an oil in a flat-tappet cam application. The detergent/dispersants in an oil will displace the basestock and other additives. Thus racing oils have about zero dispersant/detergent.
Total Base Number is a measure of the oil's resistance to acidic engine combustion byproduct buildup in the oil. Higher indicates the oil can be used longer. Long life oils which have very high TBNs. But, lower TBN is not a bad thing, particularly for an oil in a flat-tappet cam application. The detergent/dispersants in an oil will displace the basestock and other additives. Thus racing oils have about zero dispersant/detergent.
04-07-2012, 10:32 AM
#525
Le Mans Master
Thread Starter
04-07-2012, 10:45 AM
#526
Premium Supporting Vendor
04-07-2012, 11:23 AM
#527
Le Mans Master
Thread Starter
04-07-2012, 11:57 AM
#528
Le Mans Master
Thread Starter
04-07-2012, 04:45 PM
#529
Race Director
I understand. The point I was making is if you want a 10W--30 or a 10W-40 synthetic that has verified ZDDP levels your only choice is Amsoil. I see now that the Joe Gibbs hotrod oil also is available in a 10W-30 synthetic.
04-07-2012, 04:47 PM
#530
Race Director
04-07-2012, 07:43 PM
#531
Premium Supporting Vendor
04-18-2012, 02:41 PM
#532
Le Mans Master
Thread Starter
Tweaked the formatting just a bit based on requests that folks "just want the list" and aren't really interested in the other information. 
04-18-2012, 09:07 PM
#533
Instructor
Member Since: Jan 2012
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Do you mean TBN?
Total Base Number is a measure of the oil's resistance to acidic engine combustion byproduct buildup in the oil. Higher indicates the oil can be used longer. Long life oils which have very high TBNs. But, lower TBN is not a bad thing, particularly for an oil in a flat-tappet cam application. The detergent/dispersants in an oil will displace the basestock and other additives. Thus racing oils have about zero dispersant/detergent.
Total Base Number is a measure of the oil's resistance to acidic engine combustion byproduct buildup in the oil. Higher indicates the oil can be used longer. Long life oils which have very high TBNs. But, lower TBN is not a bad thing, particularly for an oil in a flat-tappet cam application. The detergent/dispersants in an oil will displace the basestock and other additives. Thus racing oils have about zero dispersant/detergent.
04-21-2012, 07:30 PM
#535
Le Mans Master
Thread Starter
Added:
Castrol EDGE 5W-50
Grades: 5W50
Claim: "Today's engines are engineering differently and face different demands than those of yesteryear. Now classic car owners who are particular about what they put into their vintage vehicles can receive modern protection from a higher zinc formula specially engineered for classic engines."
Verification: Claims compatability with API SJ & SL.
Castrol EDGE 5W-50
Grades: 5W50
Claim: "Today's engines are engineering differently and face different demands than those of yesteryear. Now classic car owners who are particular about what they put into their vintage vehicles can receive modern protection from a higher zinc formula specially engineered for classic engines."
Verification: Claims compatability with API SJ & SL.
04-21-2012, 11:27 PM
#536
Tech Contributor
Member Since: Jun 2004
Location: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
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I wrote an e-mail to Mobil several weeks ago expressing my displeasure at the frustration I experienced with their website (I mentioned I was looking for oils compatible with my flat tappet big block and was wasting a lot of time trying to find decent info on their site). I finally got a short reply today, and with limited information. The e-mail recomended the Mobil1 Turbo Diesel Truck 5W40 oil (along with the Mobil1 15W50) for my BB. I went back to the Mobil1 site and wasted a bunch more time trying to find the ZDDP levels. I've seen a chart with basic info on their oils before, but for whatever reason I can't find it this time.
So, other than the e-mail, I have nothing to substantiate the appropriateness of this oil.
I'll keep looking.
Edit: P,Z= 1100,1200 ppm
So, other than the e-mail, I have nothing to substantiate the appropriateness of this oil.
I'll keep looking.
Edit: P,Z= 1100,1200 ppm
05-01-2012, 01:35 PM
#537
Le Mans Master
Thread Starter
05-02-2012, 08:48 PM
#538
Le Mans Master
Took about 5 seconds to do a google search for the Mobil 1 ZDDP chart:
http://www.mobil.com/USA-English/Mot...duct_Guide.pdf
I have been using Mobil 1 15W-50 in my 78 L-82 for years with zero issues-1,200/1,300 PPM ZDDP!
http://www.mobil.com/USA-English/Mot...duct_Guide.pdf
I have been using Mobil 1 15W-50 in my 78 L-82 for years with zero issues-1,200/1,300 PPM ZDDP!
