Treat your diesel right with Freedom Series 100% Synthetic Diesel Oil. Freedom Series emerged when AMSOIL and Fleece Performance Engineering partnered to develop an advanced formulation for diesel pickup trucks equipped with Fleece Performance products. Freedom Series Synthetic Diesel Oil provides excellent turbo cleanliness, superior soot control, and outstanding wear protection. The result: protection engineered to perform.
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Product data sheets
View, download, or save a copy of the Product Data Sheet or Safety Data Sheet for Freedom Series 10W-30 100% Synthetic Diesel Oil.
Freedom Series 10W-30 100% Synthetic Diesel Oil is a fuel-economy-focused heavy-duty grade co-developed by AMSOIL and Fleece Performance Engineering for turbodiesel pickups equipped with Fleece Performance products. Built on synthetic base oils with a heavy-duty detergent and dispersant package, the 10W-30 formula meets API CK-4 (and prior categories) and is engineered to deliver outstanding turbo cleanliness, soot control, and wear protection in trucks that tow, haul, and run aggressive horsepower tunes.
Wear protection for tuned turbodiesels
Wear on rings and cylinder liners drives oil consumption up while pulling compression, horsepower, and fuel economy down. Freedom Series 10W-30 is formulated to deliver wear protection in demanding operating conditions, including towing, hauling, and engines modified for additional horsepower. The 10W-30 grade holds a kinematic viscosity of 12.2 cSt at 100 C (ASTM D445) and a high-temperature high-shear viscosity of 3.5 cP (ASTM D5481), keeping a load-bearing oil film between rings, liners, and bearings under sustained heat and load.
Turbo cleanliness for towing and tuning
Turbocharged diesels punish the oil at the bearing and the ring belt, especially when pulling a heavy load or running a horsepower tune. Freedom Series 10W-30 delivers the turbo cleanliness needed to support reliability when towing, hauling, or modifying for additional horsepower, helping the turbo stay free of varnish and coke that contribute to bearing wear and shaft imbalance.
Soot control and viscosity stability
Soot buildup in a diesel pickup can reduce power, increase abrasion, cause emissions-system problems, and decrease fuel economy. Freedom Series 10W-30 is naturally resistant to oxidation and the thickening effects of soot contamination. Boosted detergent and dispersant additives keep soot particles suspended and independent, preventing the formation of larger wear-causing agglomerates that grind on liners, lifters, and rings. With a Total Base Number of 10.5 (ASTM D2896) and a sulfated ash content of 1.0 percent by weight, the formula carries the alkalinity reserve needed to neutralize acidic combustion byproducts over a full drain interval while staying compatible with diesel particulate filter and SCR aftertreatment hardware.
Cold-start flow and hot-temperature stability
Freedom Series 10W-30 effectively resists thermal breakdown in high-heat service. Unlike conventional oils, the formula contains no wax and stays fluid in sub-zero temperatures for easier starting, improved oil flow, and reduced cold-start wear. The 10W-30 grade reaches a CCS viscosity of 5,403 cP at -25 C (ASTM D5293), a pour point of -40 C / -40 F (ASTM D97), and a viscosity index of 150 (ASTM D2270), so the oil pumps and circulates quickly on a cold morning and holds its working viscosity once the truck reaches operating temperature.
Reduced oil consumption and combustion-side cleanliness
Lower volatility means less evaporative oil consumption and less oil vapor passing into the combustion chamber. The Freedom Series 10W-30 NOACK volatility test result is 5.1 percent weight loss (ASTM D5800), well below typical heavy-duty diesel oil thresholds. Reduced burn-off means top-up intervals stretch out, intake-side deposits are minimized, and emissions hardware sees less ash loading from oil consumed in the combustion event.
Recommended applications and service guidance
Use the live AMSOIL product page and your owner's manual to confirm the current viscosity, API category, OEM approvals, and service guidance for your engine before ordering. AMSOIL updates approvals and recommendations as formulas and manufacturer requirements change.
For extended service, follow the current AMSOIL guidance, your equipment manual, and oil-analysis results. Extended intervals are not appropriate for every engine or operating condition, especially modified engines, unusual fuels, racing use, or equipment with special service restrictions.
Typical technical properties
Property
Value
Kinematic Viscosity at 100 C, cSt (ASTM D445)
12.2
Kinematic Viscosity at 40 C, cSt (ASTM D445)
78.9
Viscosity Index (ASTM D2270)
150
CCS Viscosity, cP at -25 C (ASTM D5293)
5,403
Pour Point, C (F) (ASTM D97)
-40 (-40)
NOACK Volatility, percent weight loss (ASTM D5800)
Freedom Series 10W-30 100% Synthetic Diesel Oil is available in a quart bottle (FD1030QT-EA) and a case of 12 quarts (FD1030QT-CA). Using AMSOIL synthetic lubricants and practicing the OEM-stated drain interval does not void a new vehicle or equipment manufacturer warranty, and all AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty. Match the right grade and OEM spec for the application with the AMSOIL Diesel Oil Guide, match the right product in the AMSOIL Vehicle Lookup Guide, then order Freedom Series 10W-30 100% Synthetic Diesel Oil.
Frequently asked questions
What engines is Freedom Series 10W-30 designed for?
Freedom Series 10W-30 is built for turbodiesel engines that specify API CK-4 (and prior categories) and are equipped with Fleece Performance Engineering products. Typical applications include Cummins, Duramax, and Power Stroke pickups running Fleece fuel-system, turbo, or related performance hardware that calls for a 10W-30 CK-4 grade. Confirm the OEM specification stamped in the owner manual before changing oil.
Is Freedom Series 10W-30 a fully synthetic diesel oil?
Yes. Freedom Series 10W-30 100% Synthetic Diesel Oil is built on synthetic base oils, contains no wax, and uses a heavy-duty detergent, dispersant, and antiwear additive package designed for soot dispersancy, turbo cleanliness, and thermal stability under towing, hauling, and tune loads.
How long can Freedom Series 10W-30 stay in service?
For turbodiesel pickup service, Freedom Series 10W-30 is recommended for the drain intervals stated by the vehicle manufacturer. The owner manual is the definitive source for the specific oil change interval on a given truck and model year. Competition service life should be governed by oil analysis, with the vehicle owner determining the appropriate change interval based on use.
Can Freedom Series 10W-30 be mixed with other diesel oils?
Freedom Series 10W-30 is compatible with other conventional and synthetic engine oils, but mixing AMSOIL diesel oil with other oils reduces its performance benefits. Plan a clean changeover when switching from a conventional or competing synthetic, and avoid topping off with a non-AMSOIL diesel oil whenever possible. Aftermarket oil additives are not recommended for use with AMSOIL synthetic diesel oils.
Does using Freedom Series 10W-30 void a new diesel truck warranty?
No. Using AMSOIL synthetic lubricants and practicing the OEM-stated drain interval does not void a new vehicle or equipment manufacturer warranty, and all AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty.
How does Freedom Series 10W-30 compare with a 5W-40 or 15W-40 diesel oil?
Freedom Series 10W-30 (FD1030) is the lighter, fuel-economy-focused grade in the Freedom Series family, with an HTHS viscosity of 3.5 cP and a NOACK volatility of 5.1 percent. Freedom Series also comes in 5W-40 (FD540) for broader temperature range and 15W-40 (FD1540) for hotter ambient and heavier-duty service. The right choice is the grade specified for the engine and the operating conditions; match the OEM viscosity stamp first, then choose the Freedom Series grade that fits.
