My wife and I just bought a 2006 LTFS. We love it. The generator only had 16 hours on it, but ran when we tested it. However, I cannot find where to check the oil, which will be necessary to fill the oil when I change it. I'm concerned because it has seven year old oil in it and I do not want to run it again without an oil change. Any help would be appreciated. I have all the manuals, but they do not tell you how to get access to check the oil and add oil.