Oil Change
Fresh Oil. Longer Engine Life. Para 1: Engine oil degrades with heat, hours, and time — and a marine engine works hard. Whether you run your boat every weekend or only a handful of times a season, staying current on oil changes is the baseline of keeping your engine healthy and your warranty intact.
At Donlin Marine, a marine oil change is never just a drain and fill. We use Mercury-approved oils and filters for every job, check fluid levels across the full engine, inspect for leaks or wear while we're in there, and make sure everything is buttoned back up correctly before you leave. It's a quick service with a big impact on long-term reliability.
Mercury-Approved Fluids
We use only manufacturer-recommended oils and filters — the right spec for your specific engine, every time.
Full Inspection Included
While we're in, we check for leaks, inspect belts and hoses, and note anything that needs attention before it becomes a problem.
Fast Turnaround
An oil change shouldn't cost you a day. We work efficiently so you're back on the water without a long wait.
Outboard & Inboard
We service two-stroke, four-stroke outboards, MerCruiser sterndrives, and inboard engines — all types, all sizes.
Don't Skip It. Don't Delay It
Most manufacturers recommend a marine oil change every 100 hours of operation or once per season — whichever comes first. Running dirty oil longer than that increases wear on internal engine components, reduces efficiency, and can void your warranty coverage. It's a small service with a big consequence if skipped.
Bringing your boat to Donlin Marine for an oil change also gives our technicians a chance to lay eyes on your engine up close. We frequently catch loose connections, minor leaks, or developing wear during routine services — before they turn into something that keeps you off the water.
Oil Change Services We Offer
We service all common marine engine configurations with the right fluids, the right process, and no shortcuts.
Four-stroke outboard oil and filter service using Mercury-specified fluids. Includes inspection of external engine components, gear lube check, and a post-service run to verify operation. / Label: 4-Stroke · All HP Ranges · Mercury
Full engine oil and filter service for MerCruiser and inboard engines, including gear oil check in the drive unit and a visual inspection of the engine compartment. / Label: MerCruiser · Inboard · Gear Lube
Combine your oil change with a seasonal inspection — we service oil and filters, check all fluid levels, test the battery, inspect belts and hoses, and give you a full rundown on your engine's condition. / Label: Oil · Filters · Multi-Point
Submit Your Service Request
Don't let an overdue oil change turn into a bigger repair. Stop into Donlin Marine in Pickstown, SD or give us a call — we'll get your oil changed and your boat back on the water quickly.