Posted by Destroked 450 on January 22, 2019 at 07:37:55 from (66.38.93.182):
In Reply to: 55 years of posted by SVcummins on January 22, 2019 at 00:04:16:
I did a good bit of wrenching for a couple of dealers and a local independent in the mid 70's.
We found that local driven short distance engines had more sludge buildup than ones belonging to those that drove longer distances.
At that time engines with Valvoline would have a dry ashy sludge that at times would completely fill the valve cover and lifter valley areas.
Engines that ran Pennzoil had a gooey tar like sludge.
Engines that ran Gulf oil had a shiny waxy sludge that was hard to clean off of the valve covers.
Quaker State wasn't a popular brand in our area at that time so I can't comment on it.
Personally I used Chevron oil in my engines back then, it would leave a black oily sludge but didn't seem to build up as much as some of the other brands. but then it may have been the way I drove.
Todays engines run much hotter and are driven longer distances, one doesn't see sludge buildup like we saw back then, I'm sure improvements in oil has also helped reduce sludge.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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