@kbuskill what oil were you using on your 269k oil change? The one with the 14.63 cst @100? Looks like, and I could be wrong but the other previous ones were mobil 1 ep 5w30? Or at least a Xw30. Just curious why the last one was higher for the cst@100.
This spring I ran valvoline r&p 5w30 for 3 oci's in my 07 pontiac with the 2.2. I'd have to look back through my records but I want to say there was 270k when I started. Did a picture through the drain plug hole before I switched over and was surprised it looked really clean for that many miles.
April 11th
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July 20th after the 3rd run of r&p roughly 12k miles total of r&p. First run I did 3k 2nd run was for 4k and the final run was 5k miles.
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Not very scientific and it's hard trying to get a good picture but not much difference in the pictures. I know a better test would have been to pop the valve cover and oil pan off before and after but I don't have time for that. The dipstick has never been shinier. It wasn't dirty to begin with but she shines now. So I'm sure it did more cleaning then what my couple pics show. The 2.2 engine also has a canister type filter so you can see the pleats (don't have to cut it open). I didn't stretch out the pleats but the filters looked the same as they have for the last 13 years.
If r&p would come in a 5w40 I would have kept using it, but I switched to a 5w40 for the rest of the summer. Now that it's winter I switched back to pennzoil pup 5w30 that I also have been running in the 15 suburban.
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