Originally Posted By: CATERHAM
Originally Posted By: toneydoc
Since you live in Michigan and DO have colder winters than we do, a 0w40 oil is fine and will flow better on start up than 5w or 10w. That motor will thank you for the good oil with good reliability. I do not think that the 4 ltr motor has to have 5w or 10w. You will treat the motor well with 0w40. Good for your motor.
No, M1 0W-40 is not a good choice for a 30wt application and it will be heavier on start-up to a 5W-30 at all temp's the OP will likely see.
Use a quality 5W-30; you'll be hard pressed to improve upon it.
Many Jeep 4.0s have shown good UOA results on Xw40 oils. Check the UOA forum. I think M1 0w40 is an excellent choice.
I do agree that a 5w30 in most situations would be thinner at startup than a 0w40. The mistake that many are making here interpreting oils is that the winter ratings are consistent across viscosity grades...they are not.
Originally Posted By: toneydoc
Since you live in Michigan and DO have colder winters than we do, a 0w40 oil is fine and will flow better on start up than 5w or 10w. That motor will thank you for the good oil with good reliability. I do not think that the 4 ltr motor has to have 5w or 10w. You will treat the motor well with 0w40. Good for your motor.
No, M1 0W-40 is not a good choice for a 30wt application and it will be heavier on start-up to a 5W-30 at all temp's the OP will likely see.
Use a quality 5W-30; you'll be hard pressed to improve upon it.
Many Jeep 4.0s have shown good UOA results on Xw40 oils. Check the UOA forum. I think M1 0w40 is an excellent choice.
I do agree that a 5w30 in most situations would be thinner at startup than a 0w40. The mistake that many are making here interpreting oils is that the winter ratings are consistent across viscosity grades...they are not.