And a 1500 with a 3.0 can achieve over 30 when driven for maximum fuel economy.
An equivalent one ton today with a 6.6 Duramax can do just as good as those old trucks while being heavier and with vastly increased towing capacity.
I'm really failing to see your point here other than you continually insist on talking about old, non-GM vehicles and family stories in EVERY dang thread.
By the way the 98 diesel with its 355 gear gets 25 mpg at 65 mph. The 2000 7.3 one ton diesel gets 22 with the more pulling gear at 65. The way my mother drove it to town on secondary roads usually at 45 mph got better than that.
I pulled mine last night, it was crusty like all the ones on the internet. I cleaned it off and put it back on.
It made a difference in drivability - truck seems to have a bit more pep to it. Milage is showing preliminarily a boost too of about 1-2 mpg.
I'm going to start checking it each oil change.
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