I guess I just do not understand. I just read the article on oil basics written by Dr. Haas. It makes perfect sense that regardless of ambient temperature a 0w-30 or 5w-30 is always the better choice over a 10w-30.
My dilemma. My Volvo owner manual clearly recommends the use of 10w-30 in lieu of 5w-30 in areas/regions where the ambient temperature frequently exceeds 86 degrees.
Does Volvo simply not understand? Why would they not just recommend a 5w-30 regardless? I just advised my mechanic (about 2 OCI's ago) to start using GTX 10w-30 in lieu of the 5w-30 I was previously using based solely on the recommendation of the owners manual.
Should I switch back to GTX 5w-30????
My dilemma. My Volvo owner manual clearly recommends the use of 10w-30 in lieu of 5w-30 in areas/regions where the ambient temperature frequently exceeds 86 degrees.
Does Volvo simply not understand? Why would they not just recommend a 5w-30 regardless? I just advised my mechanic (about 2 OCI's ago) to start using GTX 10w-30 in lieu of the 5w-30 I was previously using based solely on the recommendation of the owners manual.
Should I switch back to GTX 5w-30????