Hello, I have a 1988 Dodge B250 that has just reached 200,000. Since buying her we have retained a solid regular maintenance program with fluids, plugs, etc. She has a Rochester Quadrajet Carburetor and a 5.9l 360 engine. We put only about 6-10,000 miles on her annually with much of it being cross country travel rather than city driving.
Yesterday I removed her plugs and found that 1,3,5,7 were heavily ash crusted with relatively white insulators. 2,4,6,8 looked quite good although there were some black spots on the insulators.
I am assuming that it is an oil burning issue because we have no leaks but are going through a court every 300 miles. What would cause only one bank to crust up and the other to be o.k.?
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