5.0 V8 automatic 2WD 208k miles...smokes a bit on startup....but I don't care....just mentioning this for purposes of oil suggestions. No visible leaks. Don't care about MPG obviously because as per below, I only drive it 392 miles per year! LOOOL! Environmental details: Highest outdoor temps ~110F Lowest seen ~-3F. Typical summer highest temp yearly extreme 102F. Typical winter lowest seen 8F. I really limit driving in the winter until mid day 40-50F since it is 2WD and I like to avoid black ice. The truck is run about once every week to drop trash off at my local dump 3 miles round trip, and to refill propane in the winter...maybe to a hardware store every once in a while. It is a TRUE BEATER TRUCK with TONS of other problems making me not want to throw much money or time into it. By my calculations, I drive it ~392 miles per year. I have had the truck for 2 years and have just made sure that the oil level is even. I have no idea how long the last person left whatever oil is in there and figured that I didn't care since I'd be disposing of it soon. Well my plans have changed. Beater trucks run $1500 in my area and they are generally in horrible shape as well. Since it is such a limited use vehicle, I don't know what to do besides slowly fix it back up. I definitely don't know what to do about oil changes! Does any oil have to be swapped out once a year regardless of miles? (I think this is still the rule of thumb). Even once a year is awfully annoying since I have 6 other vehicles! Oil suggestions along with change frequency PLEASE? Thank you all so very much as always!!