What oil brands and weights are you running in your 355??? The dealer is always pushing AGIP 5w-50.
5-40 or 5-50 are fine. There are many great oils, pick one. My choices would be Mobile One or Redline.
Mobil 1 15w-50 or 0w-40? What is the concensus? Oil temp sems a few degrees cooler with the 15w-50. Thoughts?
The car was spec'd for a 40 wt. oil 10 years ago. Todays oils are considerably better so that a current 30 wt would be better. A 0W-30 or 0W-40 is the viscosity to run unless you are on the race track. In that case you may get away using a 50 wt oil but not necessarily. aehaas