Driving 55...can't draft a trucker

[RningOnFumes]

I'm doing 55 on the right most lane of the freeway and I get passed by truckers lol.

How the heck do hypermilers draft when truckers ususally go about 60-65??

If I stay up to them, it's a matter of RPM.. I'm at 2400 RPMs to 2500 RPMs (just about) at 55. If I go 60, it's at 2800 or 2900?

So which is better, the drafting, or the RPMs?

By the way, I normally do 60, this last trip of about 120 miles roundtrip, I tried sticking to 55. Free way was wide open * if not, I would not have tried, don't want to impede flow of traffic more than I have to. And on the way back, I'm sure I avoided an accident too (van with blown tire rear left tire in the middle lane *people already helping and no one hurt).

New Yaris Sedan 5speed if it matters.