Due to increased demand and industry-wide supply chain delays, we are currently experiencing above normal lead times for certain items. We are working at full capacity to ensure the quickest turn-around for your parts. Our vendors are also experiencing similar delays in obtaining raw materials for parts.

If you are in need of a part and time is of the essence, we ask you please call our sales team at 530-274-1795 to inquire about current stock status before placing your order.

If you have any questions or concerns, please do not hesitate to contact us via email or phone.

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Swepco 306 Engine Oil - Quart

Swepco 306 Engine Oil - Quart

Choose Oil Weight:
Price: $14.50
Shipping Weight: 2.00 pounds
Quantity in Basket: None


SWEPCO 306 Supreme Formula Engine Oil is a premium quality, multi-purpose engine oil speciallyformulated to provide superior performance under the most demanding operating conditions. It’s multigradeall season formula allows you to use the product on varying engine types during all seasons of theyear. It provides outstanding wear control, service life, cleanliness, thermal stability and corrosion resistancefor gas and diesel engines. It is manufactured from the very finest high VI paraffinic base stocks andutilizes the most advanced additive chemistry including DIMONYL, a unique chemical additive developedby SWEPCO.

The 10W30, 15W40 & 20W50 weights meet the API CI-4/SL specification, which is the last spec for use inpre-2007 gasoline and diesel engines. The CI-4/SL oils have a higher additive package, primarilyphosphorous and zinc than the CJ-4/SM is allowed to have, therefore it should only be used in pre-2007engines.

SWEPCO 306 is used by high-performance engine builders with confidence in all types of engines,including those utilizing flat-tappet cams, which require the oil to have a high zinc content.

• Superior friction reduction.
• Promotes cooler operating temps.
• Reduced friction and drag.
• Improves ring-land and piston skirt cleanliness.
• Lowers octane requirements.
• High quality paraffinic base stock and state of the art additive package minimizes oxidation and extendsengine service life.
• Helps reduce oil consumption.
• Exceeds API CI-4/SL (10/30, 15/40 & 20/50)
• Race proven.

• 10W30, 15W40 and 20W50

• Quart / 24 per case
• Gallon / 6 per case - Available upon special request.

Customer Reviews
Average Customer Review: 5 out of 55 out of 55 out of 55 out of 55 out of 5 1 Reviews
Write an online review and share your thoughts with others.

5 out of 55 out of 55 out of 55 out of 55 out of 5 Flat Tappet Cams
Submitted by: Desertratsocal (El Mirage, CA)

Remember folks, your International engines and most of your transplants are running the typical flat tappet cams which lack the additives to protect them from going flat. Running Swepco 306 is necessary to ensure the longevity of your camshafts and to ensure your older engines have the proper additives oils of today no longer have.



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