Oil Change
TonyG13
Member Posts: 1,329 ✭✭✭✭
Had the yard call this morning asking if we can come in early (tomorrow) instead of later this week. Marine forecast calls for small craft advisory and up to 13 footers starting tomorrow night and into the week.
So I won't have a chance to change the oil before I bring the boat in. I usually change it and have fresh oil in for winter lay-up. Question is: Would it be horrible leaving the old oil in over the winter? It will be about 50 hours on the engine since I last changed it.
Edit: I did have Blackstone Labs do an oil analysis at 25 hours and this is what that report said: "The 5.4 TBN showed plenty of active additive left to run longer. Wear metals either stayed the same or decreased, which is what we want to see after a shorter oil run, so all looks well mechanically. Good work!" (It's Quicksilver 25W-40 Synthetic Blend.)
So I won't have a chance to change the oil before I bring the boat in. I usually change it and have fresh oil in for winter lay-up. Question is: Would it be horrible leaving the old oil in over the winter? It will be about 50 hours on the engine since I last changed it.
Edit: I did have Blackstone Labs do an oil analysis at 25 hours and this is what that report said: "The 5.4 TBN showed plenty of active additive left to run longer. Wear metals either stayed the same or decreased, which is what we want to see after a shorter oil run, so all looks well mechanically. Good work!" (It's Quicksilver 25W-40 Synthetic Blend.)
Post edited by TonyG13 on
Comments
My friends boat hasn't had an oil change in about 4 years and it has 100s of hours each year. He sends the samples in and as long as they check out good then no oil change. It is getting an oil change this winter. These are very different engines from gas though.
That being said, oil is 100% better in 2024 than it was in 1995. 3k oil changes are now 7.5k changes in most motors.
You're probably good but I wouldn't make a habit out of it.
You can run Rotella 15w40 t4 oil in nearly any Chevy inboard, it's 14 bucks a gallon on walmart.com. a wix oil filter is less than 20 bucks from your favorite local auto parts supplier.
Engine oil change is about the cheapest diy part of boat ownership.