| Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | Of course, if one drives it and uses it, no short trips, gets it up to full temperature(no 160 degree or missing thermostats) for at least 15 miles, like it was designed, you should not have sludge in the pan to start with.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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