I been arguing in the Saturn forum about using in 10/40 oil in my Saturn sl2 with 161000 miles on , I use 10/40w because that the only thing that slow down oil consumption , one guy commented that ;
Using 10w-40 dino oil is not going to do anything but increase average piston temperature. Oil is the only coolant that the piston is directly exposed to and oil flow rate is what carries the heat energy away from the piston. Heat is what cooks the oil to carbon which is what blocks the rings. The higher the oil operating viscosity the lower the oil flow rate.
what do you guys make of that ?
should I go back to 5/30 oil ?
I have been using 10/40w for the last 40 000 miles without any problems
Using 10w-40 dino oil is not going to do anything but increase average piston temperature. Oil is the only coolant that the piston is directly exposed to and oil flow rate is what carries the heat energy away from the piston. Heat is what cooks the oil to carbon which is what blocks the rings. The higher the oil operating viscosity the lower the oil flow rate.
what do you guys make of that ?
should I go back to 5/30 oil ?
I have been using 10/40w for the last 40 000 miles without any problems