65,000+ results for additives
- 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 day shippinghapco-products (2,060) 96.4%Free returns122 sold
- TriboTEX Oil Additive: Treatment for Engine & Oil Automotive, with NanoparticlesOpens in a new window or tabFACTORY DIRECT - OIL ADDITIVEBrand New$97.99Top Rated Plustribotex (2,375) 99.8%Free shippingFree returns675 sold
- Lucas Oil 10003 Fuel Injector Cleaner 1 Quart Automotive Additive FAST SHIPPINGOpens in a new window or tabBrand New19 product ratings - Lucas Oil 10003 Fuel Injector Cleaner 1 Quart Automotive Additive FAST SHIPPING$11.18166auto (4,275) 99%Free shipping414 sold
- BG 44K PLATINUM Fuel System Cleaner Additive 11oz. bottle 20811 - 2 PackOpens in a new window or tabBrand New$45.00Save up to 7% when you buy morehorsesntorque (1,856) 99.9%Free shipping138 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 (33,703) 99.1%Free shippingFree returns1,420 sold
- BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 FREE SHIPPINGOpens in a new window or tabBrand New$22.00wild_773 (21) 100%Free shipping13 watchers
- Sea Foam Motor Treatment Fuel Additive Auto Marine Fleet 16 Ounce NEW!!!Opens in a new window or tabBrand New$10.99Save up to 5% when you buy morenimujh0 (477) 98.5%Free shippingLast one10 sold
- BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 Free ShippingOpens in a new window or tabBrand New82 product ratings - BG 44K PLATINUM New Fuel System Cleaner Additive 11oz. Can PN 208 Free Shipping$25.00horsesntorque (1,856) 99.9%Free shippingFree returns1,312 sold
Picked For You
Sponsored | Top selling items from highly rated sellers with free shipping- Stanadyne Performance Formula Diesel Fuel Additive - 24 PK of 1/2 Pints # 38564Opens in a new window or tabSouthwest Diesel - Authorized DistributorBrand New12 product ratings - Stanadyne Performance Formula Diesel Fuel Additive - 24 PK of 1/2 Pints # 38564$140.00Save up to 5% when you buy morediesel_since1954 (4,259) 99.7%Free shipping247 sold
- DT 550 Friction Reducer Oil Additive, 16 Oz. Pint, Free Shipping!Opens in a new window or tabBrand New$26.99the_warehousing_center (604) 99.5%Free shipping54 sold
- System 48 Engine AdditiveOpens in a new window or tabBrand New$2.00cheput55 (18) 100%+$7.57 shipping
- Yamaha Yamalube ACC-RNGFR-PL-12 Ring Free Plus Fuel AdditiveOpens in a new window or tabBrand New$23.47jorgensenpowersports (5,522) 99.2%Free shipping171 sold
- 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 4 day shippingrevxoil (3,364) 99.4%Free returns1,675 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 (1,777) 98.7%Free shipping107 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 (805) 98.7%Free shipping
- Rislone 4744 DPF Clean Automotive Additive, 16.9 oz - free shippingOpens in a new window or tabBrand New$22.74kjuh6554 (7) 100%Free shippingFree returns
- Sea Foam SF-128 Gallon Motor Treatment Fuel Additive Marine Auto RV - 128 oz.Opens in a new window or tabBrand New$68.99heintzbrosauto1 (42,555) 99.3%Free shipping210 sold
- Stanadyne Performance Formula Diesel Fuel Additive - 1/2 Gallon - Part # 38566Opens in a new window or tabSouthwest Diesel - Authorized DistributorBrand New$44.00Save up to 6% when you buy morediesel_since1954 (4,259) 99.7%Free shipping682 sold
- One New LIQUI MOLY Fuel Additive 2002Opens in a new window or tabBrand New$11.36166auto (4,275) 99%Free shipping
- 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 (22,243) 99.8%Free shipping128 sold
- Yamaha Outboard Ring Free Plus Fuel Additive Quart (32 ounce) ACC-RNGFR-PL-32Opens in a new window or tabBrand New$63.99jorgensenpowersports (5,522) 99.2%Free shipping112 sold
- 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 (32,474) 99.1%Free shipping5,136 sold
- Charge-It CH-77 Battery Additive - 2 Oz.Opens in a new window or tabBrand New$10.00Top Rated Plusjb-tools (526,230) 99.2%Free shippingFree returns174 sold
- REV X ZDDP Zinc & Phosphorus (5) - Engine Oil Additive - Restore the ProtectionOpens in a new window or tabBrand New$39.95Top Rated Plusrevxoil (3,364) 99.4%Free 4 day shippingFree returns1,614 sold
- Tufoil Engine Treatment Oil Additive Lubricant for Diesel & Gas Engines - 8 OzOpens in a new window or tabBrand New$17.88jtc_valve_sales (1,456) 98%Was: $22.35 20% offFree shippingAlmost gone448 sold
- Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 20Opens in a new window or tabBrand New$12.00johntth-31 (126) 99.2%Free shippingAlmost gone23 sold
- BG MOA Engine Oil Supplement Motor Oil Additive ADVANCED -- 3 PACK!! FREE SHIPOpens in a new window or tabNew (Other)$42.95Extra 5% off with coupondistinctyachts (1,563) 99.5%Free shipping33 watchers
- DT 550 Friction Reducer Oil Additive, 1 Quart, Free Shipping!Opens in a new window or tabBrand New$44.95the_warehousing_center (604) 99.5%Free shipping
- HAPCO - 16 oz. Lead Substitute Fuel Additive - 2 PACKOpens in a new window or tabBrand New$35.98Save up to 40% when you buy moreTop Rated PlusFree 2 day shippinghapco-products (2,060) 96.4%Free returns109 sold
- Opti-Lube XPD Diesel Fuel Additive: 1 Gallon without AccessoriesOpens in a new window or tabBrand New$82.37opti-lube (438) 100%Free shipping198 sold
- 10 ZDDPlus ZDDP Engine Oil Zinc Additive - Save your Engine!Opens in a new window or tabBrand New$93.99abcdirectautoparts (19,805) 98.1%Free 4 day shipping318 sold
- Stanadyne Performance Formula Diesel Additive 2 PK - 1/2 Gallon 38566Opens in a new window or tabSouthwest Diesel - Authorized DistributorBrand New$78.00diesel_since1954 (4,259) 99.7%Free shipping296 sold
- 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 (4,275) 99%Free shipping106 sold
- Motorcraft additive XL-3 4 oz. , free shipping !Opens in a new window or tabBrand New$12.95Save up to 20% when you buy more4vlodke (17,904) 99.5%Free shipping
- VW Volkswagen GAS ENGINE Fuel Treatment Additive Genuine OEM BRAND NEW OriginalOpens in a new window or tabNEW OEM PARTS. TRUSTED FOR 17+ YEARS! QUIRKPARTSBrand New$26.22Top Rated Plusquirkparts (976,826) 98.8%Free shippingFree returns369 sold
- 2x Yamaha Yamalube Ring Free Plus Fuel Additive Outboard Boat ACC-RNGFR-PL-12Opens in a new window or tabBrand New$48.99fcrvmarine (19,511) 98.1%Free shipping45 sold
- Stanadyne Performance Formula Diesel Fuel Additive - 1/2 Gallon - Part # 38566Opens in a new window or tabBrand New$42.00diamonddiesel (4,851) 100%Free shipping
- Archoil AR9100 16oz Friction Modifier - Oil Additive - PowerStroke FixOpens in a new window or tabFAST AND FREE SHIPPING DIRECT FROM ARCHOILBrand New$44.95archoil (6,446) 99.8%Free shipping4,338 sold
- Lucas Oil 1 Gallon Jug of Blend of Oils & Additives Fuel Treatment Set of 4Opens in a new window or tab30 Day Returns. Fast Shipping. Trusted Dealer.Brand New$116.21trendsauto (321,379) 99.1%Free shippingFree returns97 sold
- Hot Shot's Secret Diesel Extreme Diesel Fuel AdditiveOpens in a new window or tabBrand New$18.97xokd962 (981) 97.4%Free shippingFree returns5 watchers
- Pure Korean Red Panax Ginseng Extract Capsules - No additives or fillersOpens in a new window or tabBrand New$8.27 to $14.87soomiighealth (684) 97.1%Was: $16.54 50% offFree shippingfrom China
- Comp Cams 12 oz Engine Zinc ZDDP Break-In Oil Additive Lube 159Opens in a new window or tabAuthorized Dealer - 60 Day Free Returns 100% +FeedbackBrand New
- BG EPR engine performance restoration and BG MOA Oil Additive Kit FREE SHIPPINGOpens in a new window or tabBrand New$32.50wild_773 (21) 100%Free shippingLast one1 watchers
- Mechanic In A Bottle Synthetic Fuel Additive 24 Oz. 2-4 Cycle Engine RepairsOpens in a new window or tabBrand New$17.09the.real.deal2016 (91,942) 98.5%Free shippingFree returnsAlmost gone14 sold
- REPACKAGED Mobius & Kluber Watchmaking Oils & Greases - USA SELLEROpens in a new window or tabNew (Other)$5.99 to $109.99Extra 5% off with couponds_watch_shop_and_supply (988) 100%+$4.36 shipping
- Liquid Horsepower Fuel Additive (LHP) - 6oz treats 30 gallons of gasolineOpens in a new window or tabBrand New$17.95mante-debbi (632) 100%+$5.00 shipping147 sold
- Lucas Oil 10002 Heavy Duty Oil Stabilizer One Gallon Jug Automotive AdditiveOpens in a new window or tabBrand New$31.33993232maoyi (131) 99.2%Was: $32.98 5% offFree shipping16 sold
- Automotive Additive KitOpens in a new window or tabBrand New$24.99Save up to 17% when you buy moreflying.snoopy (156) 100%+$7.09 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 4 day shippingrevxoil (3,364) 99.4%Free returns66 sold
- Rislone High Mileage Engine Treatment Conditioner & Cleaner Additive, 16.9 oz;Opens in a new window or tabBrand New$5.44luboboybew (245) 89.9%Free shippingfrom ChinaLast one1 watchers
- Storage Fuel Stabilizer Winter Gas Tank Treatment Motorcycle Bike Car AdditiveOpens in a new window or tabBrand New$11.99special_deliveries_home (2,112) 99.3%Free shippingFree returnsLast one27 sold
- 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 (30,003) 98.9%Free shipping528 sold
- Comp Cams 159 12 oz Engine Zinc ZDDP Break-In Oil Additive LubeOpens in a new window or tabBrand New$19.95Top Rated Plusamsracing (44,299) 99.8%Free shippingFree returns1,563 sold
- 1-1 Oz Bars OF 100% Pure American Beeswax Filtered NO Additives Or Fillers EverOpens in a new window or tabONE TIME SHIPPING FEE 3.95 BUYING 1 OR 1000Brand New$1.00southern-wholesale-division (23,569) 100%+$3.95 shipping10,000+ sold
- Alcor TCP Fuel Additive - 1 Quart - 100LL Additive - FREE SHIPPINGOpens in a new window or tabBrand New$84.99aviationdepot (3,624) 99.1%Free shipping
- Stanadyne Performance Formula Diesel Fuel Additive One Case 16oz # 38565Opens in a new window or tabAuthorized DistributorBrand New$123.96diesel_since1954 (4,259) 99.7%Free shipping87 sold
- TriboTEX Oil Additive: Treatment for Engine & Oil Automotive, with NanoparticlesOpens in a new window or tabBrand New$94.99nhifehon1212 (728) 95.3%Free shippingLast one2 watchers
- Power Plus Top Lube 2 Pack Grape/Cherry Scented Fuel Additive for Gas/MethanolOpens in a new window or tabBrand New$31.90northbranchsynthetics (12,969) 98%Free shipping136 sold
- 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 (32,490) 98.8%Free shipping
- Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart Automotive AdditiveOpens in a new window or tabBrand New$13.90fatisky (56) 100%Free shippingAlmost gone76 sold
- 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 (1,563) 99.5%Free shipping316 sold
- 2 ZDDPlus ZDDP Engine Oil Additive - Save your Engine!Opens in a new window or tabBrand New$27.99abcdirectautoparts (19,805) 98.1%Free 4 day shipping242 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 (8,305) 99.7%Free shippingFree returns987 sold
- HPZ212 Zinc Replacement Oil Additive - 12 oz. (Pack of 4)Opens in a new window or tabBrand New$22.32bumperscomfort (2,335) 99.6%Free shippingAlmost gone26 sold
- Lysol Laundry Sanitizer Additive, Crisp Linen, 90ozOpens in a new window or tabBrand New$12.49kingsoutlet (43) 93.9%Was: $13.88 10% offFree shipping
- ✅ Liqui Moly Motor Liqui Moly Motor Oil Saver Additive 300ml can 10.14oz. LM2020Opens in a new window or tabBrand New$16.74oempartsplanet (560) 98.3%Was: $18.00 7% offFree shipping
- EngineButter "Smooth as Butter" Oil additiveOpens in a new window or tabBrand New$34.99Save up to 15% when you buy morevrysmlanml (1,915) 98%Free shipping56 sold
- Rain-x Washer Fluid Additive 16.9 oz. Bottle - RX11806DWOpens in a new window or tabBrand New$8.85aroon_traders (579) 98.7%Free shipping
- Genuine GM OEM ACDelco Limited Slip Additive 4oz 88900330 AC DelcoOpens in a new window or tabBrand New$11.98cabledahmerchevykc (1,106) 99.5%Free shipping64 sold
- 4 ZDDPlus ZDDP Engine Oil Additive - Save your Engine!Opens in a new window or tabBrand New$48.99abcdirectautoparts (19,805) 98.1%Free 4 day shipping53 sold
- Liquimoly MOS2 Anti Friction Engine Additive 300ML Can 2009Opens in a new window or tabBrand New$11.53pandaracingpro (8,470) 98.2%Free shipping84 sold
- DR TRANNY LUBEGARD TRANSMISSION INSTANT SHUDDER FIX FIXX SYNTHETIC ADDITIVEOpens in a new window or tabBrand New$11.90Save up to 10% when you buy morekressautochris (38,057) 99.9%Free 4 day shipping944 sold
- Hot Shot's Secret Stiction Eliminator Clean & Restore Oil Additive, 64oz BottleOpens in a new window or tabBrand New19 product ratings - Hot Shot's Secret Stiction Eliminator Clean & Restore Oil Additive, 64oz Bottle$56.00desmoparts (22,243) 99.8%Free shipping108 sold
- ✅ Liqui Moly 20004 Hydraulic Lifter Additive (300ml)Opens in a new window or tabBrand New$14.87oempartsplanet (560) 98.3%Was: $15.99 7% offFree shipping295 sold
- Opti-Lube Summer+ Cetane Diesel Additive: 5 Gallon Pail without AccessoriesOpens in a new window or tabBrand New$304.89opti-lube (438) 100%Free shipping
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