There has been a lot of discussion about oil and wax lately. My son just competed in his district pinewood derby this past weekend. He and I built his car in January. We prepped the wheels with Red Rocket and DD4H oil. We had to use stock axles per the rules. He won his pack race in January and he qualified for district in May. I put the car on the shelf and it was not touched between races. We did not re-prep his car for district. It ran on a 4 1/2 month old prep and performed better in May than it did in January. It ran .03 faster 5 months later. The bottle of oil is 2 years old that we used. John's stuff is the bomb just saying. Yes he did win the district but the second place car at district was built by a father and son who purchased DD4H products to great success. The dad called John to receive some tips. He put them them in contention to win it all. The previous year they finished last in their pack. This year his son walked away with two nice trophies and huge smile /images/boards/smilies/thumb.gif.