Quote:
Originally Posted by leathermang
What I was pointing out was that in the summer you should be using STRAIGHT 40 wt... not a multi weight...
Right from the FSM...
|
I'm confused. Which official recommendation do I follow? Even in this Texas heatwave the temps got under +86 F ambient in the mornings, so you shouldn't be using straight 40W, unless it's Africa hot.
As long as it wasn't 10W-40, or SAE 10W. Those are Strengstens Verboten! Right from the FSM and the electronic owners manual, of course.
I don't think the viscosity of the oil is an issue here.