Curmudgeon
Senior Member
- Joined
- Jul 22, 2017
- Posts
- 448
- Reaction score
- 986
- Location
- York, Pennsylvania
- Ram Year
- 2014 1500 Laramie 4x4 QC, True Blue Pearl
- Engine
- 5.7L Hemi
^User name checks out.89,and 90+ octane compared to 87 just allows the computer to allow slightly advanced timing,that makes the engine have just a little better performance,allowing computer to up the timing.And it may result in slightly better,maybe a mile or so fuel economy.But then premium/ midgrade costs more.87 wont hurt a thing.89 is a slight improvement.Up to you if it's worth it.I run mostly 89,cause I can