AMSOIL Reformulates XL-7500 Line
AMSOIL has just reformulated the XL-7500 line of synthetic motor oils to comply with the new SM/GF-4 specifications.
This oil is AMSOIL's least expensive synthetic oil. I use this line of oil in my wife Chevy Trailblazer. This oil is API certified and meets all the manufacturers requirements for the GTO.
It is a group III synthetic oil, which is essentially a highly refined, very pure petroleum base stock oil. To the base stock, AMSOIL adds a very robust additive package.
AMSOIL rates this oil for 7500 miles or six months, or longer as indicated by the oil life monitor (which normally has an annual limit imposed by the owners manual).
New XL Extended Life Motor Oils from AMSOIL