Hi folks, hoping to get some tips here.
I think I know a bit about cars, but when it comes to engine oil weight and grade, I'm clueless.
Question is what's the difference between 5W30 and 5W20 oil?
Is it the 20 weight that is thinner, and better for cold winters, or the opposite?
Reason I ask is that my Focus was in for an oil change, and I noticed on the bill they put in 5W20 - owner's manual spec is 5W30.
Just thought I'd get some advice before possibly going back to ask them to drain and refill with the 5W30.
I'd have posted about this on a Focus website, but those youngsters would have eaten me alive for a dumbass question like this...
Thanks!
Ray
