Originally Posted By: LubeLuke
I don't agree. Any self respecting engineer understands that these vehicles are driven by the public in MANY different conditions, and they would specify an oil which works for mom dropping the kids off at school in California, and then drives to Colorado for a ski trip on the same oil.
But that's certainly not all conditions, and people can fall out of the parameters, however unlikely. Additionally, I'm not grousing that one grade is or isn't good enough for a huge variety of conditions. One grade clearly is. After all, that's the point of multigrades in the first place. My point was that most of these vehicles could run a 0w-20 all year, , a 5w-20 all year, a 5w-30 all year, or a 0w-40 all year, or what have you.
Manuals listing more than one viscosity are getting rarer all the time. My G37's manual refers to other viscosities in phantom quotes, but only calls for 5w-30. General Motors products have called for only one or two viscosities in their manuals for a lot of years, with a special mention of 0w-30 in Arctic type climates.
I don't agree. Any self respecting engineer understands that these vehicles are driven by the public in MANY different conditions, and they would specify an oil which works for mom dropping the kids off at school in California, and then drives to Colorado for a ski trip on the same oil.
But that's certainly not all conditions, and people can fall out of the parameters, however unlikely. Additionally, I'm not grousing that one grade is or isn't good enough for a huge variety of conditions. One grade clearly is. After all, that's the point of multigrades in the first place. My point was that most of these vehicles could run a 0w-20 all year, , a 5w-20 all year, a 5w-30 all year, or a 0w-40 all year, or what have you.
Manuals listing more than one viscosity are getting rarer all the time. My G37's manual refers to other viscosities in phantom quotes, but only calls for 5w-30. General Motors products have called for only one or two viscosities in their manuals for a lot of years, with a special mention of 0w-30 in Arctic type climates.