You never want to use thicker than recommended oil in a newer engine. The tolorances are too tight. Use the right oil and enjoy your engine that runs 300K.I'd probably run Quaker State Euro 5W-40.
Now you know to never get your car serviced by the dealer again.
This has been debunked so many times. Why doesn't OP use 0w-16 then?Nah, I'm pretty sure someone here with access to TSBs said that even though it's not printed in the manual you can use all the way up to 20W50 in these based on service bulletins from Hyundai, and I recall that in the past Hyundai had originally said to use 5W30 as the recommended grade in some of their turbo engines but on a later TSB they recommended 5W40.
Tolerances are the allowed variances in the designed clearances. No the clearances are not too tight.
Here we go
My concern is ->> was there any damage by running the lower viscosity oil for 260 miles?<<-
How would anyone on the internet know If there was or not?
Depends on how you drove that distance. If towed, was fully loaded, or hauled a$$ like a street racer - then I doubt you'll see issues now, but they will come soon after warranty is over. If typical daily driver light duty, the keep on rolling and don't worry.
I doubt it. Your TGDI is probably turning the 0w30 to 0w20 after 5000mi and then you drive another 2500-5000mi before the oil change without even thinking about it
Nah you'll be aok
The clearances not tolerances big difference.
I was referring to any technical or sigentific information that supports the use of either of these grades as allowable substitutions of either one.
