I own a Lincoln Navigator and a Corvette Z06 these cars don't get much use. I might drive the navigator 5000km a year and the vette might go 10k a year. I have to change the oil perodically to maintain warranty, so can i take the oil out of these cars and put it in my civic or saab? The navi uses 5w20 syntec can i put that in my civic it requires a 5w20 i don't wanna waste good oil its still golden brown when it comes of the truck! The civic is a 03 so its out of warranty no worries there! The Z's oil i will put in my work trucks it takes PP 5w 30