When I bought my VX, Jack, the guy I bought it from was using 10w-30 high mileage oil so of course I have been doing the same. Yesterday at Advance, the dude at the register told me I should be using 5w-30. He went and got it for me. It too was high mileage oil. Isn't 5w-30 for more cooler climates. I don't know diddly squat about oil. I think the 5w is thinner than the 10w. I'm in VA where it's the 50's now, but we'll be in the 70's and 80's in no time. Jack is consuming about one quart per 1000 miles if that matters.
What does everyone else use out there? And will it matter to add a different oil without doing a complete oil change with the 5w-30.