In a motor with very high mileage would there be any difference in power (pulling a steep hill) in cold weather (below freezing) between a 5w30, 5w40, 15w50 and a 5w50? Would there be much a change in mpg?
Common knowledge says to use a heaver oil for older motors but I have searched that the heavier oils leave a film in the cylinder and get burned off. IF so, would that extra oil in the cylinder mess up the fuel ratio and cause less power?
Common knowledge says to use a heaver oil for older motors but I have searched that the heavier oils leave a film in the cylinder and get burned off. IF so, would that extra oil in the cylinder mess up the fuel ratio and cause less power?