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Hi Is there anything in particular to think about when choosing oil for a flexifuel bioethanol engine? Up until now it has run on what the Saab dealer uses = Mobil1 0W-30 or 40. Do I have any reason to use any other oil?, or should I just stick with this stuff? Car is a 2006 Saab 9-5 2,0t...

First, sorry if any english mistakes are made, I'm from Sweden Anyway a Yamaha F100 4-stroke outboard that runs 15-20 hours a year and isn't used for trolling or high speed. after warm up runs att about 4000rpm for 30-60 minutes at a time. the oil is still gold brown when i let it out in the...