Bought an el cheapo import 60#. The manual, such as it is, say to use Shell ROTELLA #40 [engine oil can also be used]. The oil supplied looked much heavier than 40 weight, more like the old 90 wt. we used to use in trans and diffs. Any thoughts on this?
Rotella IS engine oil. It IS a detergent oil, and it IS rather thick. In actual fact,#40 Rotella is VERY close to the same "thickness" as Shell Spirax #90 gear oil at normal room temperature.
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