I don't know about your 454 but in our 1980 gmc trucks 1 had a 427 and 1 had a 366. We used them hard in hot weather and a guy that worked on them told us to use 15/40 oil we put that in both and in a month the lifters we making noise . We changed back to 10/30 and in less then an hour the noise was gone. If it calls for 5/30 use it if it calls for 10/30 use that . The extra additives in my opinion are a waste of money if the oil needed it it would already be in there. We still have 1 of the trucks with 160000 miles on it and it uses very little oil. When using them at night and we would open the hood the manifold would be cherry red.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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