Welcome to Defender Canada! 
Fuel Additives
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14% offStar Brite Star Tron Stabilizer+ Fuel Storage
$13.46 - $22.31$11.53 - $19.05 -
14% offStar Brite Star Tron Tank Cleaner
$53.17 - $95.53$45.29 - $81.30 -
14% offStar Brite EZ Store EZ Start Diesel Storage Additive - 084408
$18.28$15.62 -
14% offStar Brite Star Tron Enzyme Fuel Treatment - Small Engine Formula - 14301
$10.66$9.15 -
14% offStar Brite Star Tron Enzyme Fuel Treatment - Diesel Automotive Formula - 14408
$18.72$16.00 -
14% offStar Brite Diesel Water Absorber - 084616
$37.90$32.31 -
9% offSeafoam Motor Treatment
$19.88 - $134.95$17.96 - $121.52 -
9% offSeafoam High Mileage Motor Treatment - HM16
$24.99$22.56 -
9% offSeafoam Fuel Injector Cleaner and Upper Cylinder Lubricant - IC5
$12.76$11.55 -
9% offSeafoam Marine PRO Engine Fuel Treatment - MP20
$25.39$22.91 -
9% offSeafoam Motor Treatment and Spray Combo - SF-SS
$44.40$40.02 -
19% offValvTect BioGuard Diesel Plus 6 Fuel Treatment - 32 oz - BGDP632
$73.60$59.00 -
19% offValvTect Diesel Guard Supreme Plus High Performance Diesel Additive - DFMS32
$37.10$29.80 -
19% offValvTect Marine Gasoline Additive
$7.90 - $42.94$6.44 - $34.47 -
23% offStar Brite EZ-to-Store EZ-to-Start Gasoline Stabilizer
$12.26 - $34.18$9.34 - $29.14 -
14% offStar Brite Star Tron Diesel Additive
$26.27 - $69.22$22.41 - $58.92 -
14% offStar Brite Star Tron Enzyme Fuel Treatment for Gasoline
$21.68 - $54.62$18.51 - $46.51 -
14% offStar Brite Star Tron Fuel System & Injector Cleaner - 96604
$10.42$8.95 -
14% offStar Brite Star Tron Ring Cleaner - 95616
$27.30$23.30 -
9% offSta-Bil 360 Marine Formula Ethanol Gasoline Treatment
$16.67 - $42.94$15.07 - $38.70 -
9% offSta-Bil Diesel Stabilizer - 32 oz - 22254
$44.40$40.02 -
13% offSta-Bil Gasoline Fuel Stabilizer
$10.80 - $29.80$9.34 - $26.88 -
Mercury Quickare Gasoline Fuel Treatment - 12 oz - 8M0047930
$18.10 -
Mercury Quickleen Gasoline Engine Treatment - 12 oz - 8M0047931
$21.02 -
19% offMDR Diesel Fuel Water Zorb Water Absorber - 16 oz - MDR-559
$35.62$28.62 -
19% offMDR Ethanol Gasoline E-Zorb Water Remover - 16 oz - MDR-574
$41.46$33.29 -
19% offMDR Gasoline Water Zorb Water Absorber - 16 oz - MDR-567
$37.08$29.78 -
30% offLiqui Moly Marine 4T Additive Shooter - 25102
$11.42$7.88 -
9% offLiqui Moly Marine Gasoline Stabilizer Shooter - 25100
$7.90$7.17 -
14% offLiqui Moly Marine Super Diesel Additive
$12.28$10.53 -
9% offHammonds BioborJF Diesel Fuel Additive
$32.70 - $44.38$29.49 - $40.00 -
9% offHammonds BioborMD Diesel Fuel Additive - BBMD16EZ01US
$35.62$32.12 -
BRP 2+4 Gasoline Fuel Conditioner and Stabilizer - 8 oz - 766216
$15.18 -
7% offBRP Carburetor and Choke Cleaner - 777191
$19.56$18.10
About Fuel Additives
What are fuel additives & engine treatments?
One of the biggest problems with boating fuel and the need for engine treatments are interactions with polymer components in the boat's fuel system and water issues.Being out on the water all day gives your boat excessive exposure to water, and that will play havoc with many of your systems.
Water helps facilitate corrosion, as well as the physical properties of water means that with excessive heat and cold, water can expand and get into all sorts of nooks and crannies of your motors and mechanical parts.
Engine treatments are an important part of eliminating this with proper lubrication, fuel stabilization, and winterization are a must for marine engines.
Otherwise, over time, water can begin to promote oxidation and even pitting throughout your engines.
Organic material might also propagate, which can cause blockages, as well as bad fuel which will ruin your engines.
Fuel additives are extremely effective at solving these problems.
Which is why Defender offers a wide variety of marine-specific additives to keep your boat running smoothly.