Quote:
Originally Posted by KiaTech
As well, Kia has a TSB out regarding a 'cam/crank correlation error' DTC if the wrong oil viscosity is used. It can actually cause your CVVT to be slow to respond, and will cause the DTC and a failsafe lockout of the CVVT system. I have seen this code come up (the exact DTC escapes me, but I can look it up if it's important to someone) and something as simple as an oil change (to our semi-synthetic 5W-20) has cleared it up, every time.
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Interesting...I know about the TSB for the oil filter, but didn't know about one for oil viscosity. In the owners manual and Kia tech literature, they say 5w-20 is "preferred" but that 5w-30 and 10w-30 can be used based on your area's climate/temp range.
We all know what can happen when oil thins out due to shear or fuel dilution. Starting with a 5w-20 concerns me in that regard. And basically, the recent move by some mfgrs to 5w-20 is entirely motivated by fuel economy concerns. This is fact, not opinion.
I'm okay with 5w-20 in winter months, but what about when it's 100+ degrees out and you're stuck in traffic. An potential overheat condition exists and that's when thinner oil can become volatile and thin even more, or foam, which is bad news for an engine.
BTW, the Kia dealers I've contacted are using 5w-30 and even 10w-30 on the Kia's brought in for oil changes.
Can you provide the TSB? Because that would definitely convince me to use 5w-20.
