Hi all – If you were moving to the Arctic Circle / South Bend, Indiana at the same time that you acquired a 1988 Jeep Cherokee XJ, 4.0L straight six, 4WD, what oil would you use? Chilton's is defaulting to 10W-30. I assume that's what the manual says, but I don't have it.
It's cold there, cold beyond anything I've ever contemplated growing up near Tucson, AZ. The average lows in Dec, Jan, and Feb are: 23, 17, and 19° F. The average highs aren't much higher: 36, 31, and 35° F. The record lows are basically instant death, or at least instant ball death: -18, -22, and -20° F.
The Jeep will have to be parked outside, fully exposed to these ridiculous temps. Can 10W-30 handle this? I thought 5W spotted you 15 degrees or so. Will that be good enough?
I was thinking of AMSOIL's synthetic. (I liked how mater-of-fact they were in this post, and figured I could do worse than these guys: https://blog.amsoil.com/is-motor-oil-made-from-natural-gas-better/)
Does going with synthetic change your weight preference here?
Thanks.
It's cold there, cold beyond anything I've ever contemplated growing up near Tucson, AZ. The average lows in Dec, Jan, and Feb are: 23, 17, and 19° F. The average highs aren't much higher: 36, 31, and 35° F. The record lows are basically instant death, or at least instant ball death: -18, -22, and -20° F.
The Jeep will have to be parked outside, fully exposed to these ridiculous temps. Can 10W-30 handle this? I thought 5W spotted you 15 degrees or so. Will that be good enough?
I was thinking of AMSOIL's synthetic. (I liked how mater-of-fact they were in this post, and figured I could do worse than these guys: https://blog.amsoil.com/is-motor-oil-made-from-natural-gas-better/)
Does going with synthetic change your weight preference here?
Thanks.