Guys, I was just curious what brand and viscosity oil you all are using.
I think the answer is "it depends"...
In our case, we drop the oil out at the end of each event, be it 3 passes or more...
With the Top Fuel car, we drop it every pass (of course).
In both case's we run Brad Penn. In the past the T/F car has run Amalie and Torco with no problems.
If you are running a carb'd gas engine, I would go with synthetic.