Is Amsoil XLF much worse than Amsoil ASL? I have read both good and bad about XLF after searching. Does anyone have any actual results? Has anyone had an oil analysis with either to say really how well these do against the competition? I am looking at either XLF 5w30 or ASL 5w30.

Also what is the suggested change interval with ASL 5w30 with OEM filter, provided that the driving is mixed city/highway, and isn't spirited/hard driving? I currently change my oil every 6000km (3728 miles). Can the Amsoil synthetic go a lot furter?

Thanks

 

Better start reading up on this thread to get a picture of how each oil brand performs based on actual oil analyzes, instead of guessing what you are supposed to use based on brand names or hearsays.

http://www.my350z.com/forum/showthre...258663&page=24

 

Yes, it is not as good as the ASL/SSO varieties. Its a group 3 based oil and it essentially their economy line.

 

Question is will engine benefit from any minor differences.

 

thread link has been cut, can you please re-post?

 

http://www.my350z.com/forum/showthread.php?t=258663

 

Well the TSO/SSO has been shown to be a great oil for the VQ, so if you are going to go through the trouble of finding/purchasing AMSOIL, then you should just get the good stuff

 

Does AmsOil not carry the TSO any longer or did it change it's name to SSO? I was just about order some and notice the 0W30 is now SSO. Thanks for the help.