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Old 06-18-2013, 10:22 AM   #8 (permalink)
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Originally Posted by t vago View Post
Good data points.

Ford ERFS patent - first used in 1998 Ford vehicles. Varies fuel pressure according to load.

2009 Toyota RAV4 New Features - uses a mechanical fuel pressure regulator in-tank, implying a constant pressure fuel system.

Your RAV4 MPGuino is accurate?
I don't have one in the RAV, only the ZX2. You say the min and max could vary by up to 7%, but what percent of your driving is actually at the ends of that range? The majority of my driving (85-90%) is highway at 55 mph. So the actual influence on the indicated mpg is minimal.
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