SUBARU OIL TEMP/CHANGE INTERVALS.

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I run a Subaru EA71 (1992 model) in a jetboat. Oil temp 100 deg C using Valvoline 15W-50 Durablend. I have been changing as 50 hr intervals but it has been suggested 100-150 hrs is ok. What ideas do forum owners have?

2/14/0812:15 AM

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