What does oil analysis tell me?

A lab tests a small oil sample for wear metals, dirt, fuel, water and coolant. It can warn of problems such as bearing wear, a leaking oil cooler or seawater in a transmission before they cause a breakdown.

How do you take the sample?

With the engine, transmission or generator warm, we draw oil with a clean sampling pump or take it during an oil change, label it with the hours and oil type, and send it to an independent oil analysis lab.

Can you test the transmission and generator too?

Yes. We can sample transmission oil (gear oil or ATF) and generator crankcase oil along with the main engines. Each sample is labeled separately, so you get a report for each system.

When do I get the results?

When the lab's report comes back, we send it to you and explain what it means and what, if anything, needs attention.

Is one sample enough?

One sample catches problems that are already well along. Sampling at every oil change builds a trend for each engine, and a change in that trend shows wear while it is still small.

What does oil analysis cost?

Sampling usually takes about an hour at $150 an hour, plus the lab's charge and the trip fee for work at your boat. You get a written estimate before we start.

Is oil analysis useful before buying a boat?

Yes, as one part of your checks. A sample from each engine and transmission can show wear or contamination the seller may not know about. It is a mechanic's test, not a marine survey; for the boat as a whole we recommend an accredited marine surveyor.

Breeze Marine technician using a vacuum extraction pump to draw a hot oil sample from a marine

Breeze Marine technician using a vacuum extraction pump to draw a hot oil sample from a marine (2)

Oil Sample Analysis– Engine, Transmission & Generator

Your engine's fluid is its lifeblood. We draw samples and send them to an independent oil analysis lab for spectrographic testing. This "blood test" can reveal hidden internal wear, coolant leaks and fuel dilution, often before they cause a breakdown.

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$150 /hr

Labor estimate About 1 hour

Book sends us a ticket; nothing is charged online. Before any work you get a written estimate for labor, parts and the trip fee, and nothing is done without your OK.

Trip fee By distance, one way: $30 in San Pedro, $50 in Long Beach

San Pedro$30
Wilmington, Terminal Island$40
Long Beach: Shoreline, Rainbow Harbor$50
Long Beach Marina, Alamitos Bay$60
Redondo Beach$60
Seal Beach, Huntington Harbour$75
Marina del Rey$85
Newport Beach$110

Farther away: $25 plus $2.50 a mile, one way from our San Pedro shop. No trip fee when the boat comes to our shop, or for plan members. The work of a visit is at least $150; the trip fee is on top.

Registered in California: Breeze Marine Boat Service LLC, San Pedro
Where we work: At your slip from Marina del Rey to Newport Beach, or in our San Pedro shop
Questions first: (213) 693-0224 or submit a ticket

About this service

Scientific Maintenance

The Engine
Blood Test.

Don't wait for a catastrophic failure. Marine oil analysis uses spectrographic testing to detect internal wear, leaks, and contamination, often before symptoms appear.

Wear Metals

The lab measures microscopic metal particles in parts per million (PPM). High iron can point to cylinder, gear or shaft wear; lead or copper can point to bearing wear, though copper also comes from oil coolers.

Fluid Contamination

The lab finds what shouldn't be there. Coolant (glycol) in the oil can point to a failed head gasket or a leaking oil cooler. In a diesel oil analysis, fuel dilution can point to leaking injectors or a fuel pump problem.

Oil Health

Is your oil doing its job? The lab tests viscosity (thickness), soot levels and oxidation, which shows how well the oil is holding up between changes.

The Sampling Protocol.

Clean collection for accurate engine oil analysis results.

Warm Up

We run the engine to operating temperature. This suspends contaminants in the oil, ensuring a representative sample.

Live Draw

We use a sampling vacuum pump with new, clean tubing for each sample and draw oil from the sump through the dipstick tube. We never sample from a drain pan.

Lab Transit

We label the samples with engine hours and type, then send them to an independent oil analysis laboratory for testing.

Interpretation

You receive the raw data, but more importantly, our expert interpretation and actionable recommendations based on the results.

The Proof is in the Results.

Data-driven decisions for your drivetrain.

Taking an engine oil sample with a vacuum pump

Oil sample bottles for engine, transmission and generator

Example oil analysis lab report displayed as a graph

Systems We Test.

Comprehensive fluid analysis across the vessel, including transmission oil analysis.

Main Engines Diesel & Gas Inboards, Four-Stroke Outboards

Transmissions Gear Oil & ATF

Generators Crankcase Oil

Common Questions

Why not just change the oil?

Changing oil removes the evidence. If a bearing is failing, the metal is in the oil. Draining it without testing throws away one of the earliest warning signs you can get.

How long do results take?

Results usually take several business days from collection, depending on shipping and the lab's workload. We email you the report when it comes back and explain what it means.