My understanding is that, thats why they work so well...
----- Original Message -----
From: "pcoyle" <pcoyle@frontiernet.net>
To: <dakota-truck-digest@buffnet4.buffnet.net>
Sent: Thursday, January 11, 2001 12.40 P
Subject: DML: 3923's
> Hey gonna do some mods to try and better my 10 MPG!
> Installed K&N drop in filter,5w-30 Pennzoil Synthetic,45 psi in my
> tires.
> Now got the 3923's , but I found out they are 3 or 4 heat ranges cooler
> than origional plugs.
> Should I put them in anyway? .040 Gap?
> Thanks
> Great site!
>
>
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