Old Mixed Gas

... I have been told the Catylitic's performance could be harmed by oil deposits...no proof just talk...I have run it through trucks in the past with no problems
 
I d believe that's a long term thing. 2.5 ounces of oil in a whole fuel tank on occasion is much less then the average burn rate of engine oil itself.
 
Dealer was emphatic that mixed gas will kill your CAT converter. He's probably talking from their perspective of all the machines that come through the shop with questionable fuel ,then what to do with it after draining the tanks & refilling fresh............

Steve
 
I dump my gas about 6 weeks or if I need gas in the truck, 92oct or better with full synthetic oil. But I drive 100 miles a day to and from work each day. I haven't had any problems.
 
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