Exactly........
And if you did blow a motor on 5w30 if it is possible we all have several grades of oil on hand and many have permanent records via online shopping like AZ, AAP. Walmart, Amazon., and if you're anal all you have to do is empty the oil and pour in 0w20 before the tow truck comes especially if at home or you have an oil extraction unit. That's if you're foolish enough to believe they will test your oil to make sure it was in grade.
Originally Posted By: TiredTrucker
It all has to do with your comfort level and what you can tolerate for being unique. In over 4 decades of personal and commercial vehicle ownership, I have never seen a dealer or OEM even ask much about motor oil being used let alone try to claim it was the wrong viscosity. Yes, even when I had a warranty issue. And I have yet to even hear of a dealer going to the length to test an oil to "prove" that it was the wrong viscosity or not something like dexos1 compliant. I have used many oils, gear lubes, etc that were not on some OEM's "approved" lubrication list and never had a lubrication related issue. I don't go wildly outside the bounds of common sense, but I don't always say to the OEM "yes sir, yes sir, three bags full". For me anyway, I won't sit around worrying that I am not stepping outside the box even the least little bit for warranty reasons. Millions of miles of vehicle ownership, dealing with many dealers and OEM's over the years just has not convinced me that I need to toe the line that close.
And on this one... one is going to have a real tough time convincing many folks with a modicum of mechanical reasoning that an engine that once used 5w30 just fine in 2014, now needs a 0w20 just because it now has direct injection in 2015. Actually, reasoning would say the reverse. That 5w30 would be even more applicable due to potential fuel dilution of the oil due to DI.