Is there any problem using Castrol 20W-50 in an Isuzu Trooper in the Caribbean tropics on a 13 x 3 mile island where maximum speeds are 35 mph but climbing a 1500 ft mountain is a daily occurance?
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a. What does the manual say? I suspect that if the truck has a non-north american manual, it will even recommend that kind of weights.
b. What oils are availble to you? How long of drains? How long of trips? What year/motor/milage?
c. If I had to randomly pick an oil, without knowing anything more, I might go with a HDEO 15W40, or 15W50 Mobil 1. There is nothing wrong with Castrol 20w50 that I know of, but in the heavier grades of conventional oils, it is hard to beat the HDEO's.
b. What oils are availble to you? How long of drains? How long of trips? What year/motor/milage?
c. If I had to randomly pick an oil, without knowing anything more, I might go with a HDEO 15W40, or 15W50 Mobil 1. There is nothing wrong with Castrol 20w50 that I know of, but in the heavier grades of conventional oils, it is hard to beat the HDEO's.
