I have an 2001 Blazer with 43000 miles on it what type of oil should I use?

 

it really dosent matter if you use 5 or 10. but i wouldnt go any thicker than 10w30

 

The manual specifies 5w30 for all weather conditions and 10w30 for weather conditions above freezing.

I just did the first oil change on my Bravada since buying it and mistakenly put in 10w30. I should have enough miles on it before winter sets in to change it back to 5w30 before then so I'm not too worried. I had plenty of 10w30 sitting in my garage so that's what I used.