Hello. I have a question. I recently switched fuels from traxxass to sidewinder backyard basher. I know this fuel has a higher oil content of 16% with a nitro content of 20% but my question is is after I just got done running it I had a decent amount of what looks like brown oil like liquid come out of the exhaust pipe when I tipped it on its side. I assume this is just unburnt fuel but is that normal? I have nitro rustler 2.5. Sometimes it has more oil then other times but this time i was just bliping the throttle as I was trying to run it out completely of fuel so i can put it away for the weekend. Did it just build up some unburnt fuel/oil because I wasn't wot it? Other times it only has a few drops come out but I also ran it a bit more closer to empty tank and it's a little bit cooler here in Florida today then it normally is. It seemed to run pretty good. It might be a tad bit rich tho but it opens up nicely when in wot it. I've order a os carb but it's on backorder for the last like 2 weeks so for now I gotta deal with the factory carb