9 95blkstang Member Jun 30, 2004 49 3 8 Jul 14, 2006 #1 Jul 14, 2006 #1 What is the best oil grade to use of my 93 140,000 motor? IAm currently using 10-40...should i use 5w 30 ?
What is the best oil grade to use of my 93 140,000 motor? IAm currently using 10-40...should i use 5w 30 ?
Red_LX I’m not much help unless you’re looking for ****! Founding Member Nov 29, 1999 5,896 73 129 Morgantown, WV...where couches meet their doom Jul 14, 2006 #2 Jul 14, 2006 #2 Stick with the 10W-40, it's fine...or if you want to change grades go to 10W-30.
65ShelbyClone Founding Member Sep 9, 2000 4,675 38 119 Antelope Valley, SoCal Jul 15, 2006 #3 Jul 15, 2006 #3 I would keep the weight spread in the 10w-30 to 15w-40 range depending on mileage.