Oil change?
Problem: I changed the oil in my Holiday Rambler (Ford V10) last October with 5w20 Synthetic. Later I found my chassis owners manual that states I should use 5w30. Should I change it before heading...
Forum Discussion
I don't understand!! I was told by Mobil ENGINEERS that a 5w20 oil, Like Mobil 1, would act like 5 wieght when cold and 20 wieght when hot. Likewise a 5w30 oil would act like 5 wieght when cold and 30 wieght when hot. So I would use the 10w30 oil. It flows just as good when cold and doesn't thin out as much when hot. I don't understand that difference in reasoning between Ford and what I think I remember being said by Mobil?????????????????????????
