Thread: Synthetic oil ?
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Old 06-12-2019, 05:23 PM
  #3  
alloyboy
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Join Date: Dec 2014
Location: Land down under
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Originally Posted by springerfever View Post
Guys, just curious.....with synthetic oils being used for most high-end trucks and cars....why is it not used in boats ? I have a 99 ML430 that I bought new and it now has over 407,000 miles on it with original engine. I attribute the longevity to the Mobil One 0W40 I've been using since day 1 with changes every 10,000 miles.

I know outboards generally stay in the 2000-6000 RPM range, and you would think the synthetics would be ideal for this environment. What gives ?
How did you come to that conclusion?
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