quote:
Originally posted by sjlee:
There's nothing wrong with using a 5w30 conventional as long as you do regular oil changes. I've had nothing else but that in my Acura... I now have almost 130k without any oil-related problems whatsoever. I've never had to add any additional oil between changes... no leaks or burning. My OCI has been 3750.
Also, you do realize that 5w30 is thicker than 5W-20 right?
5w30 conventional is fine for Wisconsin and the upper midwest but not for Atlanta and the deep south. A quality conventional 10w30 of Chevron/Havoline, Pennzoil, or Castrol GTX can be run year round in warmer climates.
Yes I realize that 5w30 is thicker than 5w-20 but it is not as shear stable as the Motorcraft 5w-20 which is made from better basestock oil. The MC 5w-20 is almost a 30 weight oil anyway. 5w30 requires alot of viscosity improvers and polymers to do the job and most of the time it will shear down to a 5w-20.