63,000+ results for additive
- Lubegard Transmission Fluid Additive Instant Shudder Fixx (12 Tubes)Opens in a new window or tabBrand New$99.99Save up to 20% when you buy moremarvelautomotive (925) 98.4%Free shipping
- TriboTEX Oil Additive: Treatment for Engine & Oil Automotive, with NanoparticlesOpens in a new window or tabFACTORY DIRECT - OIL ADDITIVEBrand New$97.99tribotex (2,392) 99.8%Free shippingFree returns688 sold
- REV X ZDDP Zinc & Phosphorus (5) - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$39.95Top Rated Plusrevxoil (3,413) 99.4%Free shippingFree returns1,630 sold
- XADO 1 Stage Maximum Engine Oil Additive - Protects Engine from Wear and TearOpens in a new window or tabOriginal XADO Direct US Seller IN STOCK Fast ShippingBrand New$49.49Save up to 15% when you buy morexado_us (1,786) 98.7%Free shipping113 sold
- Lucas Oil 10003 Fuel Injector Cleaner 1 Quart Automotive Additive FAST SHIPPINGOpens in a new window or tabBrand New$11.18166auto (4,497) 99.1%Free shipping441 sold
- ZDDPlus ZDDP Engine Oil Additive Restores Zinc Every Oil Change. 5 Pack DiscountOpens in a new window or tabBrand New$39.74Top Rated Plusoldbuickparts (33,940) 99%Free shippingFree returnsAlmost gone1,432 sold
- Liqui Moly CeraTec Friction Modifier Oil Additive Protection Ceramic Wear 300MLOpens in a new window or tabBrand New$29.99autolubegroup1 (13) 100%Free shipping
- Liqui Moly 20004 Hydraulic Lifter Additive (300ml)Opens in a new window or tabBrand New$10.80Extra 10% off with couponWas: $18.00 40% offgarageman01 (32,785) 99%Free shipping5,354 sold
Picked For You
Sponsored | Top selling items from highly rated sellers with free shipping- Lucas Oil 10063, TB Zinc-Plus Engine Break-In Oil Additive, 16 OZ. BottleOpens in a new window or tabBrand New$15.86Top Rated Plusrace_choice (22,420) 99.6%Free shippingFree returns869 sold
- Yamaha Yamalube ACC-RNGFR-PL-12 Ring Free Plus Fuel AdditiveOpens in a new window or tabBrand New$21.93jorgensenpowersports (5,590) 99.1%Free shipping210 sold
- BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 Free ShippingOpens in a new window or tabBrand New$24.00horsesntorque (1,890) 99.9%Free shippingFree returns1,319 sold
- Yamaha Ring Free Fuel Additive 12ozOpens in a new window or tabBrand New$21.97michaejorda-769 (65) 100%Free shipping
- Lucas 10063 TB Zinc-Plus Engine Break-In Oil Additive High-Zinc 16 Oz. (Qty 1)Opens in a new window or tabBrand New$15.89166auto (4,497) 99.1%Free shipping107 sold
- Royal Purple Max-Clean 11722 Fuel System Cleaner Automotive Additive, 20 ozOpens in a new window or tabBrand New$26.90khrismart (1,511) 97.2%Free 2-4 day shipping
- BG MOA Motor Oil Additive 11oz (12 Pack)Opens in a new window or tabBrand New$126.26traveler-ukshop (235) 94.8%Was: $132.90 5% offFree shippingfrom Canada
- HAPCO - 1 Gallon Lead Substitute Fuel Additive - TREATS UP TO 200 GALLONSOpens in a new window or tabBrand New$78.49Save up to 20% when you buy moreTop Rated PlusFree 2-3 day shippinghapco-products (2,071) 96.4%Free returns122 sold
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$12.95Save up to 5% when you buy moreuzmshahi_0 (82) 0%Free shipping15 watchers
- REV X ZDDP Zinc & Phosphorus - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$11.95Save up to 27% when you buy moreTop Rated PlusFree shippingrevxoil (3,413) 99.4%Free returns1,698 sold
- DT 550 Friction Reducer Oil Additive, 16 Oz. Pint, Free Shipping!Opens in a new window or tabBrand New$26.99the_warehousing_center (624) 99.3%Free shipping58 sold
- Lucas Oil 10002 Heavy Duty Oil Stabilizer One Gallon Jug Automotive AdditiveOpens in a new window or tabBrand New$31.00993232maoyi (409) 97.7%Was: $32.98 6% offFree shippingAlmost gone31 sold
- Liqui Moly MoS2 Anti-Friction Engine Treatment,300 ml, Oil additive,SKU:2009 USAOpens in a new window or tabBrand New$11.59zenshopp (15) 100%Free shipping
- BG MOA Engine Oil Supplement Motor Oil Additive 110 -- Fast Free Shipping!!Opens in a new window or tabNew (Other)$17.85Extra 5% off with coupondistinctyachts (1,590) 99.5%Free shipping319 sold
- One New LIQUI MOLY Fuel Additive 2002Opens in a new window or tabBrand New$11.36166auto (4,497) 99.1%Free shipping50 sold
- Stanadyne Performance Formula Diesel Fuel Additive - 1/2 Gallon - Free ShippingOpens in a new window or tabBrand New44 product ratings - Stanadyne Performance Formula Diesel Fuel Additive - 1/2 Gallon - Free Shipping$34.99gnocpeit-1995 (5) 100%Free shippingfrom Vietnam2 watchers
- Helix 5 IN 1 Fuel Treatment Additive Stabilizer 8 FL OZ 16 Gallon TreatmentOpens in a new window or tabBrand New$17.95mcatvme (15,295) 99.8%Free shippingFree returns129 sold
- Charge-It CH-77 Battery Additive - 2 Oz.Opens in a new window or tabBrand New$10.00Top Rated Plusjb-tools (527,829) 99.3%Free shippingFree returns177 sold
- Mechanic in a Bottle Synthetic Fuel Additive for all Gasoline Engines 24 oz.Opens in a new window or tabBrand New$18.50smoothsailingllc (4,187) 97.3%Free shipping
- Liqui Moly MoS2 Anti Friction Treatment Engine Oil Additive LM 2009 - 300 mlOpens in a new window or tabBrand New$15.99Save up to 5% when you buy moreg-99shop (19) 91.3%Free shipping3 watchers
- BG 44K PLATINUM Fuel System Cleaner Additive 11oz. bottle 20811 - 2 PackOpens in a new window or tabBrand New$43.15Save up to 7% when you buy morehorsesntorque (1,890) 99.9%Free shipping144 sold
- ✅ Liqui Moly 20004 Hydraulic Lifter Additive (300ml)Opens in a new window or tabBrand New$26.10lod_theod (166) 98%Free shippingBenefits charity
- TriboTEX Oil Additive: Treatment for Engine & Oil Automotive, with NanoparticlesOpens in a new window or tabBrand New$93.29gloriallen (55) 93.7%Was: $116.61 20% offFree shippingLast one3 watchers
- REV X Oil Treatment - HEUI Powerstroke Injector Stiction Fix AdditiveOpens in a new window or tabBrand New$65.95Top Rated Plusrevxoil (3,413) 99.4%Free shippingFree returns1,217 sold
- Hot Shot's Secret FR3 Friction Reducer, Gas & Diesel Oil Additive 2-16oz BottlesOpens in a new window or tabBrand New$35.95Save up to 10% when you buy moredesmoparts (22,285) 99.8%Free shipping139 sold
- New ListingLiqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$13.44em_34933 (17) 100%Free 2-3 day shippingFree returns
- Red Line 60202 Lead Substitute Fuel Additive 12 oz. BottleOpens in a new window or tabBrand New$21.99Top Rated Plushoerrracing (60,606) 99.6%Free shippingFree returns116 sold
- Hot Shot's Secret Diesel Extreme Diesel Fuel AdditiveOpens in a new window or tabBrand New$18.97xokd962 (1,234) 97.5%Free shippingFree returnsAlmost gone12 sold
- ( 2 Pack ) Mechanic in a Bottle 4 oz. in A Bottle Synthetic Fuel AdditiveOpens in a new window or tabBrand New$13.99oceansandskies (42) 100%Free shipping
- Sea Foam SF-128 Gallon Motor Treatment Fuel Additive Marine Auto RV - 128 oz.Opens in a new window or tabBrand New$68.99heintzbrosauto1 (42,806) 99.4%Free shipping211 sold
- STP Gas Treatment, 5.25 Fluid Ounces Bottle, 18039, Fuel Additive ( Pack of 3)Opens in a new window or tabBrand New$14.99Save up to 5% when you buy morecl53-69 (850) 98.7%Free shipping
- Opti-Lube XPD Diesel Fuel Additive: 1 Gallon without AccessoriesOpens in a new window or tabBrand New$82.37opti-lube (442) 99.1%Free shipping199 sold
- Red Line SI-1 Complete Fuel System Cleaner Additive Lubricant (15-Ounce Bottle)Opens in a new window or tabBrand New$19.19Top Rated Plussparktecmotorsports (50,073) 99.8%Free shippingFree returnsAlmost gone241 sold
- Lucas Oil 10002 Heavy Duty Oil Stabilizer One Gallon Jug Automotive AdditiveOpens in a new window or tabBrand New$30.81qikyc2 (32) 100%Was: $32.78 6% offFree shipping3 watchers
- Dura Lube HL-40199 Severe Fuel System Cleaner Additive, 16 ozOpens in a new window or tabBrand New$12.63xokd962 (1,234) 97.5%Free shippingFree returns
- FLEETGUARD RESTORE PLUS COOLANT ADDITIVE SYSTEM CLEANER 1 GALLON CC2638Opens in a new window or tabBrand New$49.95mshe_5036 (447) 99.3%Free shippingAlmost gone104 sold
- System 48 Engine AdditiveOpens in a new window or tabBrand New$2.00cheput55 (18) 100%+$7.57 shipping
- OEM Genuine Toyota Fuel EFI Tank Additive 00289-EFI34 6.76 FL.OZOpens in a new window or tabBrand New$25.99Save up to 10% when you buy moremiatoyotaparts (32,649) 98.9%Free shipping
- New ListingMechanic in a Bottle Synthetic Fuel Additive for all Gasoline Engines 24 oz.Opens in a new window or tabBrand New$17.05brmed4482 (11) 100%Free shipping
- YAMAHA YAMALUBE Ring Free Plus & Fuel Stabilizer Additive Outboard Pack 32oz.Opens in a new window or tabBrand New$89.95Save up to 7% when you buy morepwc_parts (73,123) 99.1%Free 2-4 day shipping253 sold
- Bar's Leaks High Mileage Engine Repair Additive, 16.9 ozOpens in a new window or tabBrand New$12.98sophia-louis (295) 97.4%Free shippingFree returnsLast one2 watchers
- ATP ST-1014 Motor Oil Additive Zinc Additive High Zinc 15ozOpens in a new window or tabBrand New$14.94curbhoppers (6,387) 98.5%Free shipping3 watchers
- Archoil AR9100 16oz Friction Modifier - Oil Additive - PowerStroke FixOpens in a new window or tabFAST AND FREE SHIPPING DIRECT FROM ARCHOILBrand New$44.95archoil (6,495) 99.8%Free shipping4,361 sold
- Gumout Fuel Injector Cleaner/Carb Cleaner Additive 6 oz - 510021W ( Pack of 2 )Opens in a new window or tabBrand New$9.99Save up to 5% when you buy morecl53-69 (850) 98.7%Free shipping
- 2PK Stanadyne Performance Formula Diesel Fuel Additive - 1/2 Gallon -Part #38566Opens in a new window or tabBrand New$60.00ngoc5648 (362) 97.8%Free shippingfrom Vietnam
- 20g KolorEFX Pearl Pigment Paint Additive for Art Polish Epoxy Resin PlastidipOpens in a new window or tabBrand New$8.49 to $10.49kolorefx (7,028) 100%+$5.25 shipping107+ sold
- Wax Additive - 4 oz Surfacing Agent for use with Gelcoat and Polyester resinsOpens in a new window or tabBrand New$16.99Top Rated Plusfiberglasssupplydepot (8,340) 99.7%Free shippingFree returns998 sold
- Power Plus Top Lube 2 Pack Grape/Cherry Scented Fuel Additive for Gas/MethanolOpens in a new window or tabBrand New$31.90northbranchsynthetics (13,049) 97.9%Free shipping139 sold
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$12.31prism_inc (71) 98.6%Free shipping4 watchers
- Genuine GM ACDelco Limited Slip Axle Lubricant Additive 4oz 88900330Opens in a new window or tabBrand New$11.95Save up to 5% when you buy morehga_performance (30,362) 98.8%Free shipping556 sold
- Lucas Oil 10003 Fuel Injector Cleaner 1 Quart Automotive AdditiveOpens in a new window or tabBrand New$12.98waltermeina (2,186) 98.6%Free shippingFree returnsAlmost gone17 sold
- New ListingMotorcraft Oil Additive - XT1Q1FOpens in a new window or tabBrand New$20.95edudem51 (15) 100%Free shipping
- Rislone Ring Seal Smoke Repair Additive, Stops Engine Smoking - 16 Oz - 1 PackOpens in a new window or tabBrand New$9.99Save up to 5% when you buy moresanper_5342 (60) 96.8%Free shipping12 sold
- Car Fuel Cleaner Gas Oil Additive Remove Engine Carbon Deposit Increase PowerOpens in a new window or tabBrand New$9.09 to $21.90sunshine_walkings88 (771) 97.5%Was: $14.63 5% offFree shipping
- Comp Cams 159 12 oz Engine Zinc ZDDP Break-In Oil Additive LubeOpens in a new window or tabBrand New$21.53Top Rated Plusamsracing (44,572) 99.8%Free shippingFree returns1,569 sold
- Liquid Horsepower Fuel Additive (LHP) - 6oz treats 30 gallons of gasolineOpens in a new window or tabBrand New$17.95mante-debbi (636) 100%+$5.00 shipping150 sold
- JEEP DODGE LIMITED SLIP ADDITIVE FRICTION MODIFIER LUBRICANT SET OF 2Opens in a new window or tabNEW OEM PARTS. TRUSTED FOR 17+ YEARS! QUIRKPARTSBrand New$19.94quirkparts (979,615) 98.8%Free shipping712 sold
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$12.50rcorn2004 (1,087) 98.7%Free shippingAlmost gone21 sold
- Cat Complete Fuel, Exhaust & Emissions System Cleaner, Automotive Additive,Opens in a new window or tabBrand New$24.54taohu-94 (103) 99%Was: $34.56 29% offFree shippingFree returns11 sold
- Rislone Hy-per Fuel Complete Fuel System Cleaner Gas Additive 16.9 ozOpens in a new window or tabBrand New$11.99xokd962 (1,234) 97.5%Free shippingFree returns
- Vintage Engine ZDDP Plus High Zinc / Phosphorus Oil Additive 4 Ounce Bottle EACHOpens in a new window or tabBrand New$9.99fap_engineparts (32,279) 99.9%+$9.80 shipping
- 2x YAMAHA YAMALUBE Ring Free Plus Fuel Additive 32oz Outboard ACC-RNGFR-PL-32Opens in a new window or tabBrand New$124.95pwc_parts (73,123) 99.1%Free 2-4 day shipping350 sold
- Flood Penetrol Oil-Based Paint Additive Conditioner, 1 Qt. FLD4 04 FloodOpens in a new window or tabBrand New$21.43trimaxstore (1) 66.7%Free shipping
- REV X ZDDP Zinc & Phosphorus (3) - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$28.95Save up to 17% when you buy moreTop Rated PlusFree shippingrevxoil (3,413) 99.4%Free returns68 sold
- Liqui Moly Ceratec Oil Additive (1) 300ml Can LM20002Opens in a new window or tabBrand New$31.00impart1731 (73,430) 99%Free shipping2,904 sold
- XADO Xtreme Economy Additive for Diesel Truck Fuel System Diesel AdditiveOpens in a new window or tabBrand New$19.99Top Rated Plusxado_us (1,786) 98.7%Free shippingFree returns132 sold
- Archoil AR9100 1 Gallon Friction Modifier - Oil Additive - All VehiclesOpens in a new window or tabFAST AND FREE SHIPPING DIRECT FROM ARCHOILBrand New$229.95archoil (6,495) 99.8%Free shipping436 sold
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