I wouldn't recommend E10 fuel consumption will suffer and may do damage to 02 sensors, use at least premium 95RON. What i normally
do is use two tanks of 95 to one tank of 98 from the same service station this in my opinion can give a good blend.
As for the rattling noise if it go's away i would not worry use good oil though which allows good cold start lubrication. noise like this only
occurs for very short time until oil pressure builds up which should be matter of seconds. The white 4 motion Bora is rare and looks good.
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