Quote:
Hard to statistically believe two quarts of 5W-20 with three quarts 0W-40 can't handle -20 temps?
Isn't that the formula you were going to use?
Well.....I would have bet it would have been good........but this AM, evidently it turns out not to be the case.
If anything, I would very-slowly loosen the oil pan bolt - let another quart drip out - then replace it with a quart of 5W-20 --- before I would drain all the oil & replace it.
Then I would save that quart of used oil for next oil change.