I agree that it all depends on the vehicle. In my Muggy with the 80mm MedUsa, 24T pinion, 40 series tires, and going WOT through grass it'll flatten those 5ks in about 3 minutes and probably only go a few hundred yards. My E-Revo with a Neu 1515 1.5D and Maxamps 8k lipos went 45 minutes one time...that's the longest it ever lasted without breaking something.
If this is in your E-Revo, I'll go down for 15 miles of fairly mild driving