Hi guys!!

Just a fast note to find out what is the best coolant for a 91 Brougham.

Also, is it good to put 89 octane gas in the tank instead of 87?, would it make a difference in the performance and MPG?

Thank you guys!!

Michel

:cat:

Use regular coolant.

Try the 89 if you want to and see if it does or not.

Go with a lower grade fuel (not below 87) unless you are hearing the engine ping.

Coolant - whatever you want. Regular Prestone or any kind of all-purpose coolant should not really make a difference.