Originally Posted By: License2ILL
Originally Posted By: A_Harman
If you're looking for a synthetic 30-weight street oil with high zddp, there are not a lot of them out there. Redline I think makes the ones with the highest-content additive packages and have the highest film strength for a given viscosity class.
But since your 1995 Camaro has a roller follower valvetrain, why are you looking for a high-zddp oil?
Thanks great info...i'll rummage over the Brad Penn oil as well. Altho I am very much sold on the Redline.
The LT1 does have a roller camshaft...but the ZDDP can still serve it well. I'm reading up mostly but I do respect the manufacturers additive packages from their factories. So just wanted to be aware of options. As well as I definitely do not agree that converters should have been a good enough reason to lower what the oil industry had in it's previous formulas. It's an alteration with a stupid reasoning behind it...likely mostly to cover the arses of the warranty periods involved and nothing more. That raises a flag to me and the better interest's of my "old faithful". So let's just say I don't want to necessarily go with their flow. And my engine is close family to older designs IMO.
Since your Camaro is a '95, the engine was designed to work with API SH oil. This was the last spec before zddp limits started to drop. For 30-weight oils, the P limit was 1200ppm. 40-weights and above had no limit. Then in 1997, API SJ was implemented with a limit of 1000ppm for 20's and 30's, and still no requirement for 40's & 50's. SJ coincided with the coming of OBD II engine management systems which did monitor catalyst performance, so it was probably no accident that the zddp limit was cut. The next cut came in 2004 with SM, which limited P to a range of 600-800ppm for 20's & 30's, and still no limits for 40-up. I have thought for some time that the minimum limit was included as a tacit admission by the API that the lower safe limit of wear protection was being reached.
Originally Posted By: A_Harman
If you're looking for a synthetic 30-weight street oil with high zddp, there are not a lot of them out there. Redline I think makes the ones with the highest-content additive packages and have the highest film strength for a given viscosity class.
But since your 1995 Camaro has a roller follower valvetrain, why are you looking for a high-zddp oil?
Thanks great info...i'll rummage over the Brad Penn oil as well. Altho I am very much sold on the Redline.
The LT1 does have a roller camshaft...but the ZDDP can still serve it well. I'm reading up mostly but I do respect the manufacturers additive packages from their factories. So just wanted to be aware of options. As well as I definitely do not agree that converters should have been a good enough reason to lower what the oil industry had in it's previous formulas. It's an alteration with a stupid reasoning behind it...likely mostly to cover the arses of the warranty periods involved and nothing more. That raises a flag to me and the better interest's of my "old faithful". So let's just say I don't want to necessarily go with their flow. And my engine is close family to older designs IMO.
Since your Camaro is a '95, the engine was designed to work with API SH oil. This was the last spec before zddp limits started to drop. For 30-weight oils, the P limit was 1200ppm. 40-weights and above had no limit. Then in 1997, API SJ was implemented with a limit of 1000ppm for 20's and 30's, and still no requirement for 40's & 50's. SJ coincided with the coming of OBD II engine management systems which did monitor catalyst performance, so it was probably no accident that the zddp limit was cut. The next cut came in 2004 with SM, which limited P to a range of 600-800ppm for 20's & 30's, and still no limits for 40-up. I have thought for some time that the minimum limit was included as a tacit admission by the API that the lower safe limit of wear protection was being reached.