Quote Originally Posted by license to ill View Post
I know Indmar recommends changing at 35 hrs for surfing and wakeboarding or high loads but that is unnecessary with advanced oils, IMO. Maybe that is true for conventional oils. Most of what I use the boat for is surfing and wakeboarding and I have a good report at 82 hours with a synthetic blend. Results may not be the same for everyone depending on the condition of the engine and how it was previously maintained. I wouldn't be afraid to put 100 hours on the intervals, especially with a full synthetic. I ended up using the rest of the T5 I had on the shelf in my oil change this year so the T6 report will have to wait another year.
Good data. Thanks for the post.