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Discussion Starter #1
Hello KIA owners!

White/blue smoke appears sometimes on cold start. Afterwards everything clear. Car is KIA Shuma 1.5 2000y 160000km gasoline. Car has no oil consumption (no oil addition necessary between change intervals).
Same behavior started on my brothers KIA Shuma 1.5 1999y with 250000km (more worn out engine... needs oil filling between intervals).
It is possible that time when these issues started coincided on both vehicles when same new oil was used.
Is it a valve seal? Could valve seal be ruined/hardened by bad oil?
Is it simply worn out engine (although I don't think so).
Thanks!
 

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Discussion Starter #3
Thank you for quick reply!

Does grade means specification like 10W-40 or quality level?
Actually, this time my supplier didn't have usual lower quality oil that I used, but for some extra money he offered higher quality brand oil.
I will check at home which oil exactly was it and post back. Although it may be better then what I previously used, it can still be "cheap" oil.

Also, I do not pay much attention to oil quality/price as much as replacing it at regular intervals (with filter since it is cheap).
 

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Discussion Starter #4
Oil is Elf Competition STI 10W-40 high performance semi-synthetic.
It could be that its low viscosity caused that along with oil seals stiffened by old age...
 
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