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All the shops around me only carry higher oil % I read that the sidewinder with 20% oil is actually 20% Castrol to 80% synthetic with a total % of 9% would that be true? It says oil 20% on the bottle

Why type of fuel/ oil% should I be running. Every place I check has 16% oil or higher and I was told 9-12% is best. What’s your recommendations,

It’s fully cleaned a sealed I put some wd40 to so it wasn’t dry. Just seems a little harder to pull the string than before I cleaned it. Just slightly. I could me imagining it or it could be bc it’s cold idk

Does it matter which way the head gasket faces? Like does it only work 1 way?

I’m new to nitro cars and got bought a collection. I’ve got a 3.3 revo that I took apart to fully clean the motor and see the shape it was in. It’s fully back together and everything seems fine except it seems like it has slightly more compression/ tug for the pull string. It might be the same...