There is a new API category for diesel engine oils that have hit the market . These oils replaced the previous API CI-4 and CI-4 + service categories and the links I'm posting will fill you in on the why's of the reduced ash , phosforus and sulphur content in these new oils .
The base oils used in the new category should be superior to past formulations and carry a higher NOAK " reduced volatile burn off " because some of the new diesel engines using these oils will be see'ing oil sump temps increased by up to 50F . So much that engine seals and materials used have been redesigned for some engine series .
Since the anti-wear additive phosforus will be reduced to aid in longetivity of the afterburn devices and since zinc " anti-wear additive " is combined with phos there has been some concern as to if these new oils will provide adequate cam lobe , piston scuff and other protection in a high performance gasoline engine . Now to get to the point , I believe most of these oils will be better than ever in both wear protection and keeping the piston ring belt clean and here's why .
The CI-4 Plus oils had the below as typical amounts ;
Phosforus .12-.15 percent by weight
Sulphur .5
Sulphated Ash 1.2-1.6
an oil like the above would have had around 1250-1550 parts per million phosforus and 1350 - 1650 PPM zinc
The new CJ-4 oils will have max allowable ;
Phosforus .12
Sulphur .4
Sulphated Ash 1.0
which would equate to around 1250 PPM Phos and 1300-1350 PPM Zinc .
http://www.mobil.com/USA-English/Lubes/Files/Delvc_PC-10_FAQs.pdf
The older CI-4+ oils used Sulphonate detergents . Some if not most of the higher tier oils used Overbased Sulphonates like calcium and even magnesium . These type detergents have not been proven that I have seen to offer any notable secondary anti-wear protection . Take boron as example . It is a primary detergent with secondary anti-wear function . I had to get to that part to introduce the Salycilate detergents that will be used in some of these CJ-4 oils .
During testing , Salycilates in very low viscosity , low phosforus formulas have actualy outperformed the Sulphonates in anti-wear testing , even with relative large amounts of phosforus used with the Sulphonates .Some of these new oils may be using this Salycilate detergent technology . Some may be using a mix of both .
http://www.pecj.or.jp/japanese/report/e-report/01M445e.pdf
JASO MA motocycle oils have for some time had a phosforus cap of .12 max allowable. That alone tells us something and with the best of these new CJ-4 oils using none of the inferior Group I base oils that require addition of pour point depressants and other non anti-wear additives that fix the cloud point and this and that so these oils will most surely have a small added HT/HS " shear resistance " inherently formulated into them by virtue of blending with lighter , higher group oils which can in turn reduce the amount of viscosity index improvers that are known to shear and thin the oil. Some 15w-40's of the past would become 30wts in as little as 1500 miles because of this shear . Factor in some fuel dillution inherent with bike engines and the oil can become really thin , dangerously so . Even 10w-40 synthetics have this happen to them but there is new terminology being used as the old Viscosity Index Improvers are replaced with Viscosity Modifiers . These VM's can have primary and secondary uses in the engine oil formula as well . More function , less along for the ride sounds good to me .
CJ-4 is marking a new age in 40 weight diesel oils that can be used in gasoline engines and they will be gradually replacing the CI-4 oils over time. It might well be these oils can offer the piston ring belt cleanliness and overall protection in non racing applications of the true synthetic formulas at a current price of only 2.00 per quart . Quantative testing by seeing some lab results will help tell .
I'd be willing to offer a few free oil analysis kits to non racing Busa owners who are currently using a CI4+ HD15w-40 Fleet oils that were going to try one of the CJ-4 oils anyway . Key words there . The CJ-4 Mobil 1300S or the new CJ-4 Chevron Delo 400 , CJ-4 Castrol and or even the Motorcraft or Phillips products might be a few of the better candidates. I have a file of Hayabusa baseline oil analysis's to go by or rather , compare to .
And don't worry about the moly . JASO specs have long been mis-interpited . Motul E-Tech 100 , Mobil 10w-40 bike oil ,Amsoil 10w-40 and a host of other bike oils have it in the formula .
The base oils used in the new category should be superior to past formulations and carry a higher NOAK " reduced volatile burn off " because some of the new diesel engines using these oils will be see'ing oil sump temps increased by up to 50F . So much that engine seals and materials used have been redesigned for some engine series .
Since the anti-wear additive phosforus will be reduced to aid in longetivity of the afterburn devices and since zinc " anti-wear additive " is combined with phos there has been some concern as to if these new oils will provide adequate cam lobe , piston scuff and other protection in a high performance gasoline engine . Now to get to the point , I believe most of these oils will be better than ever in both wear protection and keeping the piston ring belt clean and here's why .
The CI-4 Plus oils had the below as typical amounts ;
Phosforus .12-.15 percent by weight
Sulphur .5
Sulphated Ash 1.2-1.6
an oil like the above would have had around 1250-1550 parts per million phosforus and 1350 - 1650 PPM zinc
The new CJ-4 oils will have max allowable ;
Phosforus .12
Sulphur .4
Sulphated Ash 1.0
which would equate to around 1250 PPM Phos and 1300-1350 PPM Zinc .
http://www.mobil.com/USA-English/Lubes/Files/Delvc_PC-10_FAQs.pdf
The older CI-4+ oils used Sulphonate detergents . Some if not most of the higher tier oils used Overbased Sulphonates like calcium and even magnesium . These type detergents have not been proven that I have seen to offer any notable secondary anti-wear protection . Take boron as example . It is a primary detergent with secondary anti-wear function . I had to get to that part to introduce the Salycilate detergents that will be used in some of these CJ-4 oils .
During testing , Salycilates in very low viscosity , low phosforus formulas have actualy outperformed the Sulphonates in anti-wear testing , even with relative large amounts of phosforus used with the Sulphonates .Some of these new oils may be using this Salycilate detergent technology . Some may be using a mix of both .
http://www.pecj.or.jp/japanese/report/e-report/01M445e.pdf
JASO MA motocycle oils have for some time had a phosforus cap of .12 max allowable. That alone tells us something and with the best of these new CJ-4 oils using none of the inferior Group I base oils that require addition of pour point depressants and other non anti-wear additives that fix the cloud point and this and that so these oils will most surely have a small added HT/HS " shear resistance " inherently formulated into them by virtue of blending with lighter , higher group oils which can in turn reduce the amount of viscosity index improvers that are known to shear and thin the oil. Some 15w-40's of the past would become 30wts in as little as 1500 miles because of this shear . Factor in some fuel dillution inherent with bike engines and the oil can become really thin , dangerously so . Even 10w-40 synthetics have this happen to them but there is new terminology being used as the old Viscosity Index Improvers are replaced with Viscosity Modifiers . These VM's can have primary and secondary uses in the engine oil formula as well . More function , less along for the ride sounds good to me .
CJ-4 is marking a new age in 40 weight diesel oils that can be used in gasoline engines and they will be gradually replacing the CI-4 oils over time. It might well be these oils can offer the piston ring belt cleanliness and overall protection in non racing applications of the true synthetic formulas at a current price of only 2.00 per quart . Quantative testing by seeing some lab results will help tell .
I'd be willing to offer a few free oil analysis kits to non racing Busa owners who are currently using a CI4+ HD15w-40 Fleet oils that were going to try one of the CJ-4 oils anyway . Key words there . The CJ-4 Mobil 1300S or the new CJ-4 Chevron Delo 400 , CJ-4 Castrol and or even the Motorcraft or Phillips products might be a few of the better candidates. I have a file of Hayabusa baseline oil analysis's to go by or rather , compare to .
And don't worry about the moly . JASO specs have long been mis-interpited . Motul E-Tech 100 , Mobil 10w-40 bike oil ,Amsoil 10w-40 and a host of other bike oils have it in the formula .