Most Efficient Rpm

[RobertCgdll]

I do alot of highway driving and was wondering what is the most efficient rpm for the 6.0L at highway speeds?

[stroken04]

I saw the best mileage between 1900-2000 RPMs

[Galaxie]

I found that with my tune I efficiently pass everyone around 3500-4000 RPM

My milage is there not so much at a specific RPM but when that little friendly boost gauge says down. Do 55-65mph with 3:73s and you will be good!

[TampaSteve]

Under 2K, will give you the best MPG

[smokersteve]

When I tow 10k going 60mph I get better on 5th gear than 4th. 4th sits over 2k and 5th is arround 1700,1800

[Squid4life]

Originally Posted by Galaxie

My milage is there not so much at a specific RPM but when that little friendly boost gauge says down. Do 55-65mph with 3:73s and you will be good!

Where is your boost usually at while cruising at 65ish with no load?

[RobertCgdll]

Ok i usually run at 2000 or below

Originally Posted by Galaxie

I found that with my tune I efficiently pass everyone around 3500-4000 RPM

My milage is there not so much at a specific RPM but when that little friendly boost gauge says down. Do 55-65mph with 3:73s and you will be good!

Yea mines pretty efficient at passing too when you kick the boost up to 30, always fun passing the sport cars screaming

[Salebarn Rob]

if you can keep under 10 psi of boost you chould get the best milage

[smokersteve]

Originally Posted by Salebarn Rob

if you can keep under 10 psi of boost you chould get the best milage

YUP

[Squid4life]

Originally Posted by Salebarn Rob

if you can keep under 10 psi of boost you chould get the best milage

Cool. Good info. I am used to my Grand National which does not "carry" boost while cruising. Big diff with this 6.0 PSD...