I just got a Slayer and I forgot to get some air filter oil. Can I use the k+N filter cleaner and filter oil? Also I bought fuel that wasn't Traxxas it's Odonnell racing fuel was what they had , will this fuel cause issue? There is only one hobby shop within 75 miles thats why I had to buy this fuel and air filter oil. After breakin I noticed alot of oil on bumper behind muffler is this normal? Sorry about all the questions but this is my first gas RC! Thanks for any info/help with the Slayer!