recommendations

Messages
6
Location
SoCal
Got an '04 Jeep with a 3.7l gas engine. I just drained the factory oil and changed to Mobil 1 5W30 Newer Car Formula. After reading some old posts I think the 10W30 might be better. Am I correct or is this too thick of an oil? The manual says 5W30 prefered. Any help would be appreciated.
 

Al

Messages
19,251
Location
Elizabethtown, Pa
Well in So. Cal the 10W-30 would be a slightly better choice if you are going to extend drain intervals. Otherwise-not much of a difference.
 
Messages
738
Location
Suburban St. Louis
I have an '02 Jeep with the 3.7l gas engine. Got it used and have taken it from about 13k miles to 30k +. I have used Mobil 1 10W30, Rotella Syn 5W40, and the last 3 changes Schaeffer Blend 10W30. I say go with the heavier weight.
 
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