RE: 4.7L mileage and octane

From: Bernd D. Ratsch (fasstdak@hotmail.com)
Date: Sat Jun 19 2004 - 07:30:25 EDT


Yup...Next Generation 4.7L's use knock sensors - can effect mileage if
you're using different fuels.

- Bernd

-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net] On Behalf Of Ned Buckmaster
Sent: Saturday, June 19, 2004 5:56 AM
To: dakota-truck@dakota-truck.net
Cc: 'John'
Subject: DML: 4.7L mileage and octane

I have a 2000 club cab 2X4, and my friend has a 2003 quad cab 4X4, both with
4.7L engines and automatics. He swears (and I believe him) that premium
gasoline gives him at least 2 more mpg than regular. When I try premium in
my 2000, I see no difference at all in gas mileage. We have both tried this
over multiple tanks. His gets ~13 on regular, 15 on premium. I get 15.7 on
everything.

It seems to me that His has a knock sensor or something adjusting his
timing, and providing better mileage (and power) with premium gas. Mine
doesn't seem to change. Is there a difference in the engine electronics
between these two years? Can I update mine somehow? Ned Buckmaster



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