Honda has a cold climate ATV 0w30 oil that is syn blend. I'm going to run it in my Wife's 2001 Honda Accord 4 cyl, which specs 5w-20. Would it require a high percent of syn to make a 0W-X oil?
http://www.honda.ca/MCPE/Motorcycle/Acce...lsAndLubricants
http://www.honda.ca/MCPE/Motorcycle/Acce...lsAndLubricants