I plan to use either Regane or Techron in my Explorer for the first time. I've never used a fuel additive in it that I can remember (133,000 miles on it now) because it seems to run fine. Anyway, we are driving a 2000 mile trip over Xmas and I thought this would be a good time to use some. Which one should I use? Advance has both brands on sale (Techron is BOGO). Thanks!