quote:In general terms, the oil analysis for the Amsoil 5W-30 and 10W-30 seems to provide worse results then the new M1 SS. While I understand that each analysis performed is specific to the car, the general trend is there. Most recommendations, if you stay within the Amsoil family, are to switch to the Series 200 0W-30.
Originally posted by Pablo: What in particular is bugging you about the analysis reports?
quote:If the car is under warranty I would use a oil that has all the requirements you owners manual and GM demands as in the API Starburst seal Mobil has. I doubt GM would put a medicore oil in it's flagship Sports car,,Think Mobil is my opinion especially while under warranty,,then you might not want to ever change back. And you are correct,the Mobil looks very good in the analyis section even against Amsoil in a Nissan Frontier which the motors are very hard on oil.Same truck,same driving the Mobil had lower wear numbers
Originally posted by vettenuts: Am I better off swaping my 5W-30 for the 0W-30? Even though my warranty states 5W-30 which is why I went that way to start with?
quote:SJ formula oils have been replaced by SL and you are totally safe running SL now.
Originally posted by vettenuts: I checked my manual last night. The requirement is for SJ oil. My Amsoil bottles state "SL", yet I read on this forum that the oil doesn't meet this requirement. So why is it on the bottle and how do I know it even meets SJ?
quote:I'm sorry Pablo, but I will argue with any amsoil dealer that all of amsoil oils with exception to the xl7500 series DO NOT MEET the SJ or SL API certs and they surely DON't EXCEED those specs. This is a known fact and that is why they are NOT API certified and to use this oil will open the door for a motor company to deny a claim if they so choose. This also includes modifing filtration systems or any other systems will void warr's.
Originally posted by Pablo: Vettenuts writes:quote:The oil meets SL,SJ etc. Relax.
My Amsoil bottles state "SL", yet I read on this forum that the oil doesn't meet this requirement.
quote:Wouldn't the BEST way to show that they've passed all the API tests be to actually get API certification? As I stated in another thread, there is something wrong when the (supposedly) "best" synthetic oil avaialbe is not measured or approved against the industry standard battery of tests that the other syns on the market are.
Originally posted by Pablo: Bob - with all due repect please tell me what portion of any API(sequence) tests any of Amsoil's motor oil fails?