Motor Oil Additives and Treatments

Proper maintenance will save you lots of money throughout the years. At Autobarn we carry engine flushes to remove dirt and sludge from your motor, oil stop leak to fix that minor leak problem you always had, engine treatment to restore gas mileage and leaves your engine running smoother, and more! We feature brands from Lucas, Lubro-Moly, Zmax, Royal Purple, STP, Gunk, White Shepherd, Rislone, Tufoil, CD-2 and Lubegard.
Tufoil Engine Treatment 8 oz.
Tufoil Engine Treatment 32 oz.
Tufoil Engine Treatment 1 Gallon
Tufoil Engine Treatment For Trucks (50 oz)
Tufoil Engine Treatment 8 oz.
Slipperier than Teflon to make engines start easier, run cleaner, faster, and longer.
Our Price: $12.95
Tufoil Engine Treatment 32 oz.
Our Price: $48.95
Sale Price: $43.95, 2/$81.90
You Save: $5.00
Tufoil Engine Treatment 1 Gallon
Our Price: $151.95
Tufoil Engine Treatment For Trucks (50 oz)
Our Price: $61.95
Sale Price: $59.95
You Save: $2.00
Tufoil Engine Treatment For Motorcycles 2 Oz.
4 Cylinder Engine Restorer & Lubricant (11 oz.)
6 Cylinder Engine Restorer & Lubricant (15 oz.)
8 Cylinder Engine Restorer & Lubricant (19 oz.)
Tufoil Engine Treatment For Motorcycles 2 Oz.
Our Price: $8.95
Sale Price: $6.95
You Save: $2.00
4 Cylinder Engine Restorer & Lubricant (11 oz.)
Our Price: $8.49
6 Cylinder Engine Restorer & Lubricant (15 oz.)
Our Price: $10.49
8 Cylinder Engine Restorer & Lubricant (19 oz.)
Our Price: $11.95
SLICK 50 Synthetic Engine Treatment (15 oz)
ATP AT-205 Multi-Purpose Leak Re-Sealer (8 oz)
Lucas Motorcycle Oil Stabilizer (12 Oz)
Liqui-Moly Cera Tec Motor Oil Additive (300 ML)
SLICK 50 Synthetic Engine Treatment (15 oz)
Fights performance robbing friction 18% better than synthetic motor oil alone
Our Price: $19.95
Sale Price: $17.95
You Save: $2.00
ATP AT-205 Multi-Purpose Leak Re-Sealer (8 oz)
Stops leaks in the power steering, transmission, engine, differential, sunroof seals, etc.
Our Price: $12.95, 2/$23.90
Lucas Motorcycle Oil Stabilizer (12 Oz)
Our Price: $6.49, 2/$12.30
Liqui-Moly Cera Tec Motor Oil Additive (300 ML)
High-tech ceramic wear protection product for all motor oils
Our Price: $29.95
Sale Price: $26.95, 2/$51.50
You Save: $3.00
Lubro-Moly Motor Oil Saver (300 ML)
Lubro-Moly MoS2 Anti-Friction Engine Treatment (300 ML)
Lubro-Moly Pro-Line Engine Flush (500 ML)
ZMax Engine Treatment (12 oz.)
Lubro-Moly Motor Oil Saver (300 ML)
Our Price: $9.95, 2/$18.90
Lubro-Moly MoS2 Anti-Friction Engine Treatment (300 ML)
Our Price: $8.95, 2/$17.10
Lubro-Moly Pro-Line Engine Flush (500 ML)
Our Price: $14.95, 2/$28.50
ZMax Engine Treatment (12 oz.)
Our Price: $22.95
Lucas Heavy Duty Oil Stabilizer (1 Quart)
Lucas Heavy Duty Oil Stabilizer (1 Gallon)
Lucas Synthetic Heavy Duty Oil Stabilizer (1 Qt.)
Lucas Engine Oil Stop Leak (32 oz.)
Lucas Heavy Duty Oil Stabilizer (1 Quart)
Our Price: $13.99
Sale Price: $12.49, 3/$32.85, 6/$62.34, 12/$119.40
You Save: $1.50
Lucas Heavy Duty Oil Stabilizer (1 Gallon)
Our Price: $29.95, 2/$56.90
Lucas Synthetic Heavy Duty Oil Stabilizer (1 Qt.)
Lucas synthetic oil stabilizer stabilizes oil pressure, eliminates hesistation, rough idle, stalling and friction for more power and MPG
Our Price: $14.95
Sale Price: $12.95, 6/$74.10, 12/$148.20
You Save: $2.00
Lucas Engine Oil Stop Leak (32 oz.)
Our Price: $9.95, 2/$19.50
Lucas Engine Oil Stop Leak (Gallon)
Royal Purple Engine Break-In Oil (1 Qt.)
Lucas Engine Break-In Oil Additive (16 oz.)
STP Smoke Treatment (14.5 oz.)
Lucas Engine Oil Stop Leak (Gallon)
Our Price: $31.95, 2/$60.70
Royal Purple Engine Break-In Oil (1 Qt.)
Our Price: $11.95
Lucas Engine Break-In Oil Additive (16 oz.)
Our Price: $13.95, 2/$26.50
STP Smoke Treatment (14.5 oz.)
Our Price: $5.25
Blue Devil Rear Main Sealer (8 oz.)
Blue Devil Oil Stop Leak & Conditioner (8 oz)
Gunk Bearin' Seal Engine Sealer (12 oz.)
Gunk Valve Medic Valve Treatment (12 oz.)
Blue Devil Rear Main Sealer (8 oz.)
Our Price: $13.95
Blue Devil Oil Stop Leak & Conditioner (8 oz)
Our Price: $34.95
Sale Price: $19.95
You Save: $15.00
Gunk Bearin' Seal Engine Sealer (12 oz.)
Our Price: $3.49
Gunk Valve Medic Valve Treatment (12 oz.)
Our Price: $3.99
Gunk 5-Minute Motor Flush (32 oz.)
Rislone Engine Treatment (16.9 oz.)
Rislone Ring Seal (15 oz.)
STP Oil Treatment (15 oz.)
Gunk 5-Minute Motor Flush (32 oz.)
Our Price: $6.99
Rislone Engine Treatment (16.9 oz.)
Our Price: $6.49, 12/$65.88
Rislone Ring Seal (15 oz.)
Our Price: $4.95
STP Oil Treatment (15 oz.)
Our Price: $4.99, 3/$13.35, 6/$26.70, 12/$47.88
Marvel Mystery Oil (16 oz.)
Marvel Mystery Oil (32 oz.)
LUBEGARD Bio/Tech Engine Protectant (15 oz.)
LUBEGARD Engine Flush (15 oz.)
Marvel Mystery Oil (16 oz.)
Retards the formation of power dissipating motor deposits, such as gums, varnish, and sludge
Our Price: $4.29
Sale Price: $3.99, 6/$22.14
You Save: $0.30
Marvel Mystery Oil (32 oz.)
Our Price: $6.99, 2/$13.30, 6/$38.94
LUBEGARD Bio/Tech Engine Protectant (15 oz.)
Will extend your engine's oil life, resulting in extended oil and filter change intervals
Our Price: $12.97
Sale Price: $6.97
You Save: $6.00
LUBEGARD Engine Flush (15 oz.)
Our Price: $8.99

  • "Auto Barn.net was the only vendor who stocked all the products I needed at the best price and fastest free shipping." (5/23/18)

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  • "Very easy to find what I wanted" (5/23/18)

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  • "Very competitive pricing and free shipping is a great combination." (5/22/18)

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  • "I always find that your products are of good quality." (5/12/18)

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