Re: What weight oil do y'all use? I have a 97 W/ almost 200k Pros&Cons different Weig
Consider the temperatures of where you live, and/or where you might go. Oil-use-charts are readily available in order to meet lubrication requirements of the weather temperatures in your expected reality.
My '89 hates "synthetics" as they seem to want to slide past the 'old' rear main seal, i.e; drip.., drip.., like one every so often, (overnight a teaspoon). "Dino-oil" seems to allow a bit of sludge to find it's way.., and better help in making a complete sealing of that RMS which seems to, (since), only drip a drop overnight.
STORY; Back-in-the-day; I have had simple straight Dino 30 weight gel-up badly at -45 degrees, (the great duh-factor), and prevented starting a '79 Jeep left outside in the Great State of Alaska. (no rotations what-so-ever). Had to put together a small 'smuge-pot' with very rusted bent/straight nails, and thusly filled up with old grease, and motor oil. The rusted nails acted as wicks when lit up with a match. Placing said pot on the snow under the oil pan for about an hour allowed starting. SAFETY NOTE; Even though that great engine had mostly only AMC painted surfaces, (so very little surface oil-muck anywheres), I watched carefully in order to put out any fire that might run-a-way.., and brrrrr.
Mostly I use 5w30 in the winter, and 10w30 in the summer. I usually prefer to use an electrical Moroso oil pan heating pad, (rather than messing around with a freeze-plug installation, blah, blah), but this past year mudding wasted it, and a tree took down my electrical line.., sob.
Follow the advice the previous members have stated.., and you'll be ok.