Back in my Navy days, we had a young kid that was traveling home from CT to Ohio for the holidays. We were talking about car maintenance and he said he hadn’t had an oil change since he got to the ship. A year and a half. Granted, some of those months were underway, but still. Anyway, he said he checked it and it was on the low mark, so he added a little bit of WATER to get it full! I thought he was kidding, but he was not…..
He was leaving the next morning, so I took him to the Navy exchange, bought him 4 quarts of oil. Luckily, they had the correct filter (they had a limited selection.). I also got a catch drain pan that closed so you can take to recycling. We did the oil right there in the Navy Exchange parking lot (I had some tools in my truck.). He left the next day and returned after the new year. Still driving that vehicle when he transferred a couple years later.