Any quick thoughts on the Rotella T 10W30? I couldn't resist a Craigslist ad and ended up purchasing twelve cases @$10.00 per. $120.00 total for 144 quarts seems like a [censored] good deal. I have used the 5W40 and understand that that syn is fantastic. Is the 10W30 in line with Rotella's 15W40 performance?