My daughter drives a 2007 Trailblazer with a 4.2 I6. We got it with 170-175k (can't remember for sure), and it now has 200k miles. When we got it, I had some RGT 5W30 that I bought because of a rebate, so I used that. It seemed to use a qt about every 1500 miles or so. After that I switched to some PPHM 5W30 that I also had on hand, and oil usage stayed about the same. I didn't like it, but it has a lot of miles on it, so I wasn't surprised. Late last year, I decided to try something different, and bought some Maxlife 5W30 (just the regular blend, not full syn). I am very surprised with the result: it hasn't burned a bit of oil! With over 1000 miles since the oil change, the level on the dipstick hasn't moved off of the Full mark. Will definitely be staying with the Maxlife. Even though there are seldom sales/rebates on it, it's less expensive than a new catalytic converter.
I still believe SOPUS makes quality oils, but this particular engine didn't seem to like them. Just sharing my experience...thought it was interesting.
I still believe SOPUS makes quality oils, but this particular engine didn't seem to like them. Just sharing my experience...thought it was interesting.