4 Stroke Oil

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Everyday Value
Delo 400 SDE Motor Oil, SAE 15W-40, 1 Gallon
CHEVRON
$17.99
CHEVRON
$26.99
Everyday Value
Premium SAE 25W-40 4-Stroke Marine Engine Oil, Gallon
QUICKSILVER
$39.99
CHEVRON
$129.99
Everyday Value
25W-40 Synthetic Blend 4-Stroke Outboard Oil, Gallon
QUICKSILVER
$50.99
SHELL
$28.99
WEST MARINE
$6.99
Everyday Value
Premium SAE 25W-40 4-Stroke Marine Engine Oil, Quart
QUICKSILVER
$11.99
QUICKSILVER
$53.99
QUICKSILVER
$14.99
SIERRA
$47.99
SIERRA
$59.99
SIERRA
$27.99
SIERRA
$14.99
WEST MARINE
$9.99
CHEVRON
$7.99 - $129.99
SIERRA
$11.49
WEST MARINE
$9.99
SIERRA
$11.99
SIERRA
$119.99
Everyday Value
Premium SAE 10W-30 4-Stroke Marine Engine Oil, Quart
QUICKSILVER
$11.99
WEST MARINE
$32.99
WEST MARINE
$13.99
WEST MARINE
$32.99

Four-Stroke Oil for Marine Use

Four-stroke oil, also called four-cycle oil for marine engines is formulated to protect engines that operate in a hostile, salty, wet environment. Typically these oils are called heavy-duty oils and are formulated with different additives. Most are suitable for inboard diesels and gasoline engines. West Marine branded oils include Premium 4-Stroke Oil designed for gas and diesel inboards and comes as single-weight and multi-viscosity oil. Multi-viscosity oils include 10w30 and 10w40 4-stroke boat engine oils. 4-stroke outboard oil includes special additives to meet the lubrication challenges of modern 4-cycle outboards and includes multi-viscosity options. West Marine also offers 4-cycle oils from Chevron (Delo 400), Pennzoil and Quicksilver. Container sizes include pints, quarts, gallons, 2.5 gallon and 5-gallon sizes.