Originally Posted By: addyguy
Buster,
Thinking of maybe trying the new EP 5W-20 SN for a 9-10k run to see how it compares, or just stick with what works?
X2. I think this oil has enough life left to easily make it to 10k. Then you can run the EP 5w20 in the summer for 10k miles as well and see how it compares.
I honestly don't see the big wow factor in not adding any oil, esp if the level gets down a bit towards the bottom of the dipstick. With half a quart of top off mid way through the interval, the results would look even better and then the oil could definitely make it to 10k and still have plenty of TBN to spare.
Great run regardless. Definitely run it longer next time.