Is it bad to put premium gas in a flex feul vehicle and can you still go back to e85 or regular gas
Using premium is a waste of money but you won't hurt anything and you can switch to other grades of gas at any time with no harm.
Agree with F_O_R 100%.
Ok well thanx for your insight
Looking for a Used F-150 in your area?
CarGurus has 213,250 nationwide F-150 listings starting at $1,295.
Search Ford F-150 Questions
Ford F-150 Experts