Friday mistake number #7…went to WMart and purchased a 5 qt jug of Pennzoil Platinum for the oil change on my 2005 Toyota 4Runner V6. Went home did my oil change, dumped the 5 qt jug + ½ gt of 5w-30 M1 to top things up. Then I looked at the Pennzoil jug and realized it was 5w-20 not 5w-30…d’oh! In my haste at WMart, I grabbed the jug from the back of the rack (because that’s fresher ya know) and didn’t examine it…just assumed everything in that row was 5w-30 (guess not)! Everything I ever read says this Toyota V6 only takes 5w-30 (it doesn’t qualify for the Toyota 5w-20 TSB)…any advice? Are 7500 miles in the Wisconsin cold weather going to be OK or should I bite the bullet and pay for my lack of attention to detail?