Port Aransas, Texas · Marine & equipment lubrication

AMSOIL for Port Aransas boats and equipment.

Port A is offshore country. Twin and triple outboard rigs running to the rigs and beyond spend hours at cruise, then sit on a lift in salt air between trips. That combination — heavy sustained load followed by long humid idle periods — is the hardest single duty cycle on the Texas coast for both engine oil and gear lube.

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What we see in Port Aransas

The three problems worth planning around.

Long offshore runs at sustained cruise load

Salt-air corrosion during extended time on the lift

Gear lube water intrusion on high-hour lower units

Typical equipment here

Twin and triple outboard offshore rigs, sterndrives

Common questions

Storage and layup, which is where most damage happens.

Should I change my boat oil before or after winter storage?

Change it before storage, not after. Used oil holds acids, fuel dilution and moisture, and leaving that mixture sitting against bearings and cylinder walls for months is where a great deal of off-season corrosion damage happens. Draining it and refilling with fresh oil before layup means the engine sits with clean oil and a full additive package. On the Gulf Coast this matters more than in cold climates, because our layup periods coincide with high humidity rather than freezing dry air.

My boat sits on a lift for months at a time. What is that doing to it?

Extended idle time in Gulf humidity does more damage to most engines than running them does. Each temperature swing cycles humid air through the crankcase and fuel system, condensing moisture that pools in low spots, and without running hours to burn it off, that moisture stays. The engines we see with the worst internal condition are almost never the high-hour ones — they are the low-hour boats that sat. If a boat is going to sit, the two highest-value interventions are fresh oil going into storage and fuel treatment to keep ethanol from separating.

All marine questions

Port Aransas customers

Tell us what you run and where it sits.

Engine make and model, roughly how many hours a season, and whether it is trailered, slip-kept or on a lift. That is enough to give you a specific answer instead of a catalog page.