Published On Aug 15, 2020
Basically the last test for my 4-53T is a 425 miles mountain hwy trip through BC's interior and coastal mountains. Engine performed really well with oil temps down 15 (210 vs 225) degrees from the previous trip. Fuel economy increased to 17.5 mpg, another 1 mpg increase. Engine is slowly breaking in and running better than ever. Happy Detroit.:)
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