I have a hard time seeing how the oil would cause a noticeable difference in temps...Was it warmer on the day that you began to notice it ? Ambient temps can make an engine feel more hot and will affect the frequency that the fan comes on...
That said, If I were using a regular 10W40 auto oil I wouldn't use the supertech but that's just me...It may be a fine oil but I'd be more comfortable with something like Castrol or Valvoline 10W40....
That said, If I were using a regular 10W40 auto oil I wouldn't use the supertech but that's just me...It may be a fine oil but I'd be more comfortable with something like Castrol or Valvoline 10W40....