Ron,
If you mixed standard (green) with extended life (red) coolant the resulting color would probably a brown. If so, I wouldn't be worried about oil in the coolant. That said, you have some other concerns. Mixing equal amounts can cause the resulting fluid to gel, clogging the small coolant passages in the system. Also a small amount mixture can cause foaming of the coolant, resulting in decreased cooling capability. My advice would be to get a coolant analysis done and if recommended, have the system drained, well flushed, and refilled with the coolant of choice. Also write the coolant type near the fill point so this doesn't occur in the future. If you want to try to make it home first, watch your temperature and add water (distilled) but no more coolant. You may also want to drain some coolant and replace with water. This assumes you don't have any mountain driving ahead that will put a strain on the cooling system.
Steve