Hello All! My wife and I are flying home to California at the end of this week for Christmas. My dad is getting on in years and has some health problems, so I was going to change the oil for him in his 2001 Mexican Beetle (on a 1967 pan). It is a stock 1600cc air-cooled engine with EFI. I think the last time he changed the oil was at least 2 years ago, unknown amount of kilometers. It makes me cringe to think about and I partially want to change it as I want to buy it from him later and would like to protect my investment! My dad says he usually runs 15w-40 in it. I'm planning on throwing in some Rotella T 15w-40 and a Wix 51088 filter. Sound like a good plan? Any other suggestions?