When should I start using synthetic oil??

[Lazerdot]

The XL series is not the extended drain interval oil I use. It also is less expensive and still allows 7500 miles.

I mis-spoke about Amsoil in a previous post. So let me clarify. Amsoil has pure synthetic oils and other products that are partial synthetic. I'm sure the company is very proud to advertise their 100% products, but also has other products that compare well with the competition.

As I've said, the research and choice is yours to make.

As far as the facts go I'm not arguing your point. Just pointing out that there is information available for people to use in choosing the fluids they want to use. You provided some links highlighting that point.

With Amsoil I'm using a quality product and am using my car in more severe conditions to help highlight that point.

Thanks for the correction and information everyone can use.