Hi, Good morning. I am help out a young friend who is just starting in dirt oval track racing. He will be using a GM 602 crate engine in a NE style dirt modified. My question is this, what would be a good choice of engine oil to use in this enviroment, i.e.; 6200 max rpms 210' water temp, track sizes ranging from tight 1/4 miles to big long straightaways 5/8 miles. Years ago when I raced this class we ran JG XP3 but that is too costly for this budget. I am look for something would offer good protection, but not be too expensive to change out every 10 nights of racing. I am considering something like M1 10w30HM or maybe a HDEO like Rotella 15w40 or Delvac ESP 5w40. I want it to be something that is easy to find, not some boutique oil that has to be ordered on online everytime. You know go to NAPA or Walmat. I am also looking at gear oils, because we will be running different size tracks and changing gears often, ( it is a Winters QC rearend) I am considering something from either Mobil or Valvoline in the 75w90 weight. I have researched this on all the crate message boards and spoken to all of my friends who run this class and everybody has their own opinions and favorites. So I am looking for insight here, questions, comments, concerns?