Hd74ica
Senior Member
- Joined
- May 24, 2018
- Posts
- 234
- Reaction score
- 226
- Location
- Lake Superior Michigan/San Diego
- Ram Year
- 2018
- Engine
- 6.4 Hemi
Hello,
Sold my '18 2500 6.4 and bought a new 2021 2500 6.4 with a 3.73 4x4 and have a question regarding octane. I know my 18 owners manual said mid grade 89 was preferred however the 21 owners manual says nothing about mid grade 89 and states to use 87 (without ethanol). So I'm looking for input from the board regarding 87. Also will the 3.73 get better MPG than the 4.10 I had? Thanks for the info.
David
Michigan's thumb
Sold my '18 2500 6.4 and bought a new 2021 2500 6.4 with a 3.73 4x4 and have a question regarding octane. I know my 18 owners manual said mid grade 89 was preferred however the 21 owners manual says nothing about mid grade 89 and states to use 87 (without ethanol). So I'm looking for input from the board regarding 87. Also will the 3.73 get better MPG than the 4.10 I had? Thanks for the info.
David
Michigan's thumb